Plugins and Stuff

So, github removed the ability to specify commits for the pull request, only allowing for the head of whichever branch. Anyway, the pull request includes:

.gitignore: some basics that got annoying

bravo/plugins/__init__.py: addition that allows plugins from other locations
    see:
        http://twistedmatrix.com/documents/12.2.0/core/howto/plugin.html#auto2
    and:
        http://docs.python.org/2/library/site.html
    for details.

Also look at bravo-win/main.py to see how I'm using site.addsitedir().