Revert "Added a whole mess of jekyll-bootstrap"

Because I screwed up the .gitignore file thinking I would need to push
the theme. Should have trusted that the rake install:theme command would
be smart enough to do the right thing.

This reverts commit 7e337e8d80a37633a7cbcf3c8c3d5f9ec4c1983c.
Recommitting with an appropriate .gitignore ...