Add Git revision and build date to HTML output.
Consolidate GitHub URL into conf.py.
Fix typo.
Make wording more friendly.
Merge pull request #51 from seanfisk/sean/wording-fixes

Make wording more friendly.
Fix Python style error.
pyPEG2 is out, Grako is in for parsing.

Closes #39.
Merge pull request #55 from seanfisk/sean/grako-parser

pyPEG2 is out, Grako is in for parsing
Merge pull request #48 from seanfisk/sean/build-date-revision

Add revision and build date to HTML docs.
Add labels back; they are used for BetterPlanner.

This reverts commit d2ff75a826aa3dd0e6f0d2d0964bf4b3c76d159f.
Merge branch 'master' into sean/split-advanced-openssh