Temporarily remove the example project link from the README.

The link will go back once the official example app is updated and added to the websocket-rails organization.
Update the travis ci build status image to point to the new location.
Merge pull request #130 from moaa/master

Channel join/part events
Update the README and gemspec with the new org URLs.
Remove example project link from README until the updated project is finished.
Core team member links on the README.

I could have sworn using just the root relative path worked fine
for me before. Strange.
Merge branch 'master' into more_org_updates

Conflicts:
	README.md
defer on_open to EM.next_tick. fixes #135