Merge pull request #62 from johnb30/master

Fix var assignment.
Added text on logged warnings to index.rst
Merge pull request #63 from philip-schrodt/master

Added text on logged warnings to index.rst
Updated dictionaries in petrarch/data/dictionaries and the config.ini file to use the Dictionaries current as of 1-Sept-2014; confirmed that running 'python petrarch.py batch' codes the Gigaword demo.
Merge pull request #64 from philip-schrodt/master

Updated dictionaries in petrarch/data/dictionaries and the config.ini fi...
Implemented story-level discards; added discard validation to unit tests
Merge pull request #65 from philip-schrodt/master

Implemented story-level discards; added discard validation to unit tests