11/11/2014, 0.0.1, First working version containing PubMedArticle and PubMedFetcher, and upload to Python cheeseshop.
11/11/2014, 0.0.2, Fixes bug in utils preventing a tmp file from being created for DOIs.
11/25/2014, 0.0.3, Adds MedGenFetcher / MedGenConcept, demo_pubmed.py and demo_medgen.py CLI scripts, actual README kinda.
11/25/2014, 0.0.4, Catching PubMedFetcher edge conditions, raise MetaPubError w/ nicer error messages more often.
11/25/2014, 0.0.5, MetaPubObject class now stores xmlstr in an attribute (I mean, why not).
11/25/2014, 0.0.5.1, Put last_page attribute into PubMedArticle class.
11/25/2014, 0.0.5.3, Nomenclature fixes for clarity.
11/30/2014, 0.0.5.4, MedGenFetcher.get_uid_for_cui. Nomenclature normalization: medgen "id" to "uid", "cuid" to "cui".
11/30/2014, 0.0.5.5, PubMedArticle gets to_dict() method. Attributes now set at __init__ (instead of magic properties)
12/01/2014, 0.0.5.6, Minor fixes for PubMedArticle pages attributes.
12/04/2014, 0.0.6, MedGenConcept attribuets now preprocessed at __init__. Bugfix for modes_of_inheritance.
12/19/2014, 0.0.7, MedGenConcept.OMIM is now a list. Better exception catching for OMIM data handling.
12/27/2014, 0.0.8, PubMedFetcher.pmids_for_citation (fetch list of PMIDs for given citation strings).
1/12/2015, 0.0.8, PubMedArticle.ISSN attribute parsed.
1/15/2015, 0.0.9, Various minor bugfixes.
1/19/2015, 0.1.0, PubMedArticle raises MetaPubError if given bad PMID. Minor docstring improvements.
1/20/2015, 0.1.1, bugfix in PubMedArticle pages processing.
1/22/2015, 0.1.2, moved Borg class into base.py. Added 'email' arg to MedGenFetcher and PubMedFetcher to pass to eutils.QueryService.
1/23/2015, 0.2.1, CrossRef class joins the party. added a few new utilities to utils. 
1/24/2015, 0.2.2, Improvements to pmid_for_citation, allowing transfer of CrossRef slugs directly into function as kwargs.
1/27/2015, 0.2.3, Bugfixes in string processing in CrossRef. CR result['slugs']['authors'] list instead of ['au1'], ['au2'], etc.
