Updated itm/gib TopTermsPerTopic API to use keys [term, value] instead of [term, freq] to match GIB visualization convention.
Renamed itm/gib.TermPMI and .SentencePMI fields to [source, target, value] from [first_term, second_term, value] to match GIB visualization naming convention.
Added TopicCount to git/itm API.
Added lda/Vocab api.
Updated itm/gib API.

Changed TopicCovariance to return a list of tuples.
Added 'rank' to TermPMI and SentencePMI values.
Better path checking for bin/scripts
Increased CSV reader/writer maximum field sizes.
Removed unneeded file.
Updated Makefile and demo to include cappp datasets.
Remove percentage max co-term count.
Updated default corpus_db options, and added logging messages.
Fixed issue where some top-term PMI were not stored because they're in the bottom 50% of the term PMIs scores.
Compute term PMI online from probs and co_probs.
Fixed DB deadlock issue while resetting default options.
Changed Makefile demo ordering.
No longer loading sentence PMI by default in itm/gib.