3.2.1(WIP):
  - Add pg_wait_sampling in the config extension list (Julien Rouhaud, thanks
    to Adrien Nayrat for the report)
  - Don't try to detect if a hypotetical index would be used if no suitable
    index is detected (Julien Rouhaud, thanks to Guillaume Lelarge for the
    report)
  - Fix lost filter when changing the time range (Pierre Giraud, thanks to Marc
    Cousin for the report)
  - Fix database wizard query validation for pg11+ (Julien Rouhaud)
  - Handle hypopg unsupported access methods in dataabase wizard (Julien
    Rouhaud, thanks to Adrien Di Mascio for the report)
  - Fix compatibility with SQLAlchemy 1.3+ (Julien Rouhaud, thanks to github
    user mchubby and irc user ChOcO-Bn for the report)
  - Fix query detail if no data is found on the selected range (Julien Rouhaud,
    thanks to irc user ChOcO-Bn for the report)
  - Fix some metrics in wait events and general query datasources (Julien
    Rouhaud, thanks to Adrien Nayrat for the report)
3.2.0:
  - Add support for pg_wait_sampling to display wait events statistics and
    graphs, require pg9.6+ (Julien Rouhaud)
  - Show a sorted list of servers on login screen (meikomeik)
  - Add category to the list of column in the config overview page (Julien
    Rouhaud, thanks to Nehemiah I. Dacres for the feature request)
  - New breadcrumb and many other UI improvements (Pierre Giraud)
  - Fix behavior when changing time interval and then changing back to last
    hour (Julien Rouhaud, reported by Thomas Reiss)
  - Allow both "user" and "username" in configuration files (Julien Rouhaud)
3.1.4:
  - Export all data in csv export (thanks to jdeshayes for the feature request)
  - Reword double negation, thanks to Pierre Giraud for noticing
3.1.3:
  - Fix wrong calculation of microseconds difference (thanks to Eric Champigny)
3.1.2:
  - Fix I/O time unit on overview dashboard
  - Fix problem with explain queries (thanks to dblugeon)
  - Cosmetic changes to CPU time
3.1.1:
  - Detect powa-archivist / powa-web incompatibility
  - Handle quals which are not optimizable at all
  - Fix grid rendering.
  - Change default sorting order to DESC
  - Change default sort order on query page to duration desc
  - Use the time interval when rendering urls in Grids
  - Propagate updatePeriod on zoom to picker
  - Add export to CSV feature on grid
  - Fix case when quals dont belong to the same rel
  - Ignore errors while getting hypoplans
3.1.0:
  - Fix figures in query details, thanks to Eric Champigny for the patch
  - Fix graphs to display local time instead of UTC time
  - Fix IO timing figures on database overview (thanks to ribbles for the
    report)
  - Fix query page when pg_qualstats isn't available
  - Display dropped databases in the UI (requires at least powa-archvist 3.0.1)
  - Notify that server is listening, display socket information (thanks to
    Pierre Hilbert for the feature request)
  - Always display overall informations on a query, even if not statistics is
    present
  - Display server and connection information in top-bar
3.0.2:
  - fix regression in period updates
3.0.1:
  - Display installed version of handled extensions
  - Display information on pg_track_settings
  - Make query detail widget smaller
  - Fix qualstat_getstatdata, condition was ignored
  - Better hint on fail wizard.
  - Fix some syntax erors
  - Handle case n_distinct is unkown.
  - On per-cluster view, the avg runtime is displayed, not the total runtime.
  - Add a "runtime per sec" serie on per-cluster and per-db views.
  - Show the initially sorted column in grids.
  - Don't display sidebar on login page.
  - Add tabbed dashboards
3.0.0:
  - Add indexes suggestion for the whole database workload.
  - Fix bug with negative microsecond differences
  - Add support for hypopg
  - Handle example queries from pg_qualstats
  - Handle prepared statements
  - Add example on how to specify a client encoding
2.0.11:
  - fix bug on "other queries" panel on qual page
  - other bug fixes
2.0.10:
  - add compatibility for wsgi on tornado < 4
2.0.9:
  - add index_url config parameter
2.0.8:
  - Compatibility with sqlalchemy 1.0.0
2.0.7:
  - Add zoom-on-drag behaviour to graphs
  - Fix redirect after login
  - Add logging for authentification errors
2.0.6:
  - fix bug with python2 relative imports
2.0.5:
  - display cpu / user time as a percentage of query time
  - initial changelog

