Merge pull request #16 from numenta/contributor-updates

Contributor updates
Added github ribbon and travis-ci status banner. Removed bar-o-buttons.
Merge pull request #17 from rhyolight/add-github-travis-links

Added github ribbon and travis-ci status banner. Removed bar-o-buttons.
Add a news feed.
Merge pull request #19 from arlolra/feed

Add a news feed.
Added the ticket tracker URL to nupic docs.
Adding .travis.yaml to gh-page branch so it won't auto-build in travis.
Merge remote-tracking branch 'upstream/gh-pages' into contributor-updates