0.0.4, 2013/11/02 Replaced bioinformatics.nki.nl with stoics.org.uk .
0.0.3, 2012/08/15 Added pubmed_version/2.
0.0.2, 2012/07/11 Added examples in pldoc of predicates.
Factored out some common flags in options and created
corresponding auxiliaries to enable sharing of code.
Allowed first argument of pubmed_summary_info/3 to be a list.
Added programming,Prolog search example with tabulation.
Test groundness of search term.
0.0.1, 2012/07/07 - Basic functionality with 2 predicates and packaged with packs.
Tested with SWI-Prolog 6.1.8 (git.development).