Firehose

* Added Sphinx-based documentation (David Malcolm)

Prebuilt docs can be seen at
http://firehose.readthedocs.io/en/latest/index.html

* Added parser for flawfinder (David Carlos de Araujo Silva)

* Added parser for splint (David Malcolm)

* Parser for clang analyzer now captures version information,
testid, and other per-issue data (David Malcolm)

- the findbugs parser now accepts the XML format rather than plaintext format
- a new parser for the output of frama_c

Thanks to Shuxiong Ye and to vasramc for their help with this release.

This release adds a parser for the output of the findbugs tool, along with various bugfixes and other internal cleanups.

Thanks to Léo Cavaillé, Matthieu Caneill, Nicolas Dandrimont, and yeshuxiong for their help with this release.