README: Add section of in-progress features
README: Correct a typo re. cc-mode-conversion
Enable travis-ci

- Add travis configuration file
- Fix test for older Emacs(<= 24.3).

Because font-lock-add-keywords does not work in batch-mode on older Emacs.

Signed-off-by: Eric James Michael Ritz <ejmr@plutono.com>
Merge remote-tracking branch 'origin/master' into work/ccmode