2023-03-01: release of 1.051 with
* new KTClusCXX (1.0.1), a C++ re-implementation of the interface and
  features of Mike Seymour's Fortran ktclus package (including
  DIS algorithms and various hadron-collider distance measures). 
  Provided by Andrii Verbytskyi
* Update of LundPlane to 2.0.3, to fix missing header installation

2022-08-20: release of 1.050 with
* updated LundPlane to 2.0.2, fixing compilation issues with g++-12

2022-06-15: release of 1.049 with
* updated Nsubjettiness to 2.2.6, with thread-safety improvements

2021-12-08: release of 1.048 with
* inclusion of C++11 check files (fixes bug reported by Andrii Verbytskyi)

2021-12-06: release of 1.047 with LundPlane updated to v2.0.1
* adds RecursiveLundEEGenerator for e+e- studies, with examples
  from spin-correlation analyses of arXiv:2103.16526 and
  arXiv:2111.01161
* Note: fjcontrib now requires a compiler that supports C++11 or higher.
  The configure scripts attempts to add CXXFLAGS arguments to enable this
  if not already enabled. Please report any issues you encounter.

2021-08-21: release of 1.046 with RecursiveTools updated to v2.0.1
* added rare divide-by-zero in calculation of mu2

2020-08-04: release of 1.045 with
* first release of Centauro (DIS jet algorithm plugin), v 1.0.0

2020-03-07: release of 1.044 with
* update of RecursiveTools to 2.0.0 (relative to 2.0.0-beta2,
  brings documentation improvements)

2020-02-23: release of 1.043 with
* updates of ConstituentSubtractor to 1.4.5 and
  LundPlane to 1.0.3 to fix c++98 compatibility issues
        
2019-07-18: release of 1.042 with
* update of ConstituentSubtractor to 1.4.4
  (updates to function naming, treatment of massive inputs,
  selectors for correcting specific sets of particles, use of
  ability to use primary-particle info in CS distance)

2018-12-04: release of 1.041 with
* update of ValenciaPlugin to 2.0.2 (bug fix for negative beta)

2018-12-04: release of 1.040 with
* update of ValenciaPlugin to 2.0.1 (bug fix for treatment massive particles)

2018-10-31: release of 1.039 with
* update of LundPlane to 1.0.2 (only affects python code)
* documentation and scripts updated for new HEPForge phabricator system

2018-08-30: release of 1.038 with
* new LundPlane contrib, version 1.0.1

2018-07-20: release of 1.037 with
* update of ConstituentSubtractor to 1.3.1

2018-06-06: release of 1.036 with
* update of Nsubjettiness to 2.2.5, fixing bug involving
  undefined pointer in AxesDefinition

2018-05-28: release of 1.035 with
* update of ConstituentSubtractor to 1.2.7
  (ability to correct just phase space defined by fastjet::Selector,
  change of grid size possible with subtract_event_using_charged_info,
  updated examples)
* update of RecursiveTools to 2.0.0-beta2 with bug fix for recent
  clang compilers.
  
2018-05-18: release of 1.034 with
* update of ConstituentSubtractor to 1.2.5
  (big fixing + support for "pt,y,phi" inputs)
* minor modification to the template Makefile for new contribs

2018-02-15: release of 1.033 with
* update of EnergyCorrelator to 1.3.1
  (memory leak fixed, functionality unchanged)

2018-01-17: release of 1.032 with
* update of EnergyCorrelator to 1.3.0
  (Speed up of core ECF code, functionality unchanged)

2017-12-20: release of 1.031 with
* update of ConstituentSubtractor to 1.2.4 (which
  adds back in the full set of example programs)

2017-10-13: release of 1.030 with
* update of RecursiveTools to 2.0.0-beta1 (included RecursiveSoftDrop,
  IteratedSoftDrop, BottomUpSoftDrop, as well as ee versions)

2017-09-10: release of 1.029 with
* release of FlavorCone 1.0.0
* update of ConstituentSubtractor to 1.2.3

2017-08-30: release of 1.028 with
* update of ConstituentSubtractor to 1.2.2 (added back an
  erronously-renamed function)

2017-08-10: release of 1.027 with
* update of ConstituentSubtractor to 1.2.1 (new behaviour for massive
  particles and speed improvements for whole-event subtraction)

2017-01-25: release of 1.026 with
* update of ConstituentSubtractor to 1.1.5 (new pileup subtraction
  options and rho-rescaling)

2016-10-07: release of 1.025 with
* update of EnergyCorrelator to 1.2.0 (with new generalized energy correlation functions)

2016-06-21: release of version 1.024 with
* update of Nsubjettiness to version 2.2.4 (fixed bug with multi-pass axes)
* update of VariableR to version 1.2.1 (fixed documentation and comments)

2016-04-28: release of version 1.023 with
* update of Nsubjettiness to version 2.2.3 (fixed bug with tau_N for
  jets with less than N constituents)

2016-03-30: release of version 1.022 with
* VariableR version 1.2.0 (faster clustering when used with FastJet>=3.2.0)
* ConstituentSubtractor version 1.1.1 (FastJet rho_m support, faster algorithm, ...)
* Nsubjettiness version 2.2.2 (replaces deprecated features in FastJet)
* GenericSubtractor version 1.3.1 (replaces deprecated use of auto_ptr)

2015-10-12: release of version 1.021 with
* new contrib: QCDAwarePlugin, version 1.0.0 (from A.Buckley and C.Pollard)

2015-10-05: release of version 1.020 with
* update of Nsubjettiness to version 2.2.1 (fixes a bug in the Makefile
  that broke building of shared libraries)
* install permissions of libfastjetcontribfragile.so switched from
  0644 to 0755

2015-09-21: release of version 1.019 with
* update of GenericSubtractor to version 1.3.0 (adds rho_m support for
  FastJet v3.1)

2015-09-07: release of version 1.018 with
* update of Nsubjettiness to version 2.2.0 (inclusion of the XCone jet
  algorithm; inclusion of new measures; interface improvements; bugs fixed)

2015-05-05: release of version 1.017 with
* new contrib: ClusteringVetoPlugin, version 1.0.0

2015-04-07: release of version 1.016 with
* new contrib: ValenciaPlugin, version 2.0.0 (new e+e- clustering algorithms)

2014-11-25: release of version 1.015 with
* update of EnergyCorrelator to 1.1.0 (adds C1, C2 and D2 observables)

2014-08-17: release of version 1.014 with
* new contrib: SoftKiller 1.0.0 pileup removal tool (from Matteo
  Cacciari, Gavin Salam and Gregory Soyez)
* update of JetCleanser to version 1.0.1, fixing a C++11 compilation issue

2014-07-09: release of version 1.013 with
* Nsubjettiness updated to version 2.1.0 (from 1.0.3). Maintains
  backward compatibility and adds a new recommended interface.
* new contrib: RecursiveTools with v1.0.0 including ModifiedMassDropTagger
  and SoftDrop (from Gavin Salam, Gregory Soyez and Jesse Thaler)

2014-06-03: release of version 1.012 with
* VariableR updated to version 1.1.1 (from 1.0.1), with optimized code 
  and new recommended interface.

2014-04-06: release of version 1.011 with 
* new contrib: ConstituentSubtractor (from Peter Berta, Martin
  Spousta, David W. Miller and Rupert Leitner) 

2014-02-26: release of version 1.010 with
* new contrib: JetsWithoutJets (from Daniele Bertolini, Tucker Chan, 
  Jesse Thaler)

2014-02-03: release of version 1.009 with
* new make targets fragile-shared and fragile-shared-install
  which build and install a single libfastjetcontribfragile.so
  for the whole of fjcontrib. This is a temporary fix to 
  provide a shared lib and will change at some future date.

2013-09-24: release of version 1.008, with
* new contrib: JetCleanser 1.0.0 (from David Krohn, Matthew Low, 
  Matthew D. Schwartz, and Lian-Tao Wang)
* replacement of the data file with pileup in data/, so as to also
  include particle ID and charge information

2013-09-03: release of version 1.007, with
* new contrib: SubjetCounting 1.0.1 (from Sonia El Hedri, Anson Hook, 
  Martin Jankowiak, Jay G. Wacker)
* fix for a bug that was preventing configuration with explicit inclusion 
  or exclusion of more than one contrib

2013-08-27: release of version 1.006 with
* Nsubjettiness updated to 1.0.3 (compiler fixes, minor code reorganisation)

2013-06-04: release of version 1.005 with
* new contrib: ScJet 1.1.0 (from Jeff Tseng)

2013-05-28: release of version 1.004 with
* GenericSubtractor updated to version 1.2.0 (new constructors, example bug-fix)

2013-05-01: release of version 1.003 with 
* new contrib: EnergyCorrelator 1.0.1 (from Jesse Thaler, Gavin Salam 
  and Andrew Larkoski)

2013-04-12: release of version 1.002, with
* GenericSubtractor updated to version 1.1.0 (fixes an important bug wrt 1.0.0)

2013-02-23: release of version 1.001, with
* new contrib: VariableR     1.0.1  (from Jesse Thaler)
* new contrib: Nsubjettiness 1.0.2  (from Jesse Thaler)
* improved output from configure, fixes of typos in documentation

2013-02-07: release of version 1.000, containing
* JetFFMoments, version 1.0.0
* GenericSubtractor, version 1.0.0
