bump git to v1.8.2.1
backport 1.8.2.2 changes from homebrew master formula

git bugfix release.  also includes formula change for
mxcl/homebrew#19097 so git can compile with l10n if needed (but
disabled by default)
include class docs and fix quotes for linter

this should hopefully make travis-ci shut up
bump git formula to 1.8.2.3
Merge pull request #11 from mroth/v1.8.2.1

bump git to v1.8.2.3