Update README.rst

Added make_clean_all directive for borked environments.
Move css before first_bookmark.

If first_bookmark has issues then the CSS will not build. Changing the order so this shouldn't be as much of an issue.
Merge pull request #404 from craigmaloney/patch-2

Update Makefile install, move first_bookmark to end.
Merge pull request #402 from craigmaloney/patch-1

Update README.rst for "help help it's broken" assistance.
Add tag_suggestions to the bmark api

- Update chrome extension to use those suggestions.
- Add deps for the new libraries.
- Add target for nltk data. It downloads into download-cache for now.
- Update chrome extension version for release.