Extract channels and router in channel_test
Fix unused var
Update ex_doc so we get syntax highlight
Removing readme docs
Merge pull request #552 from phoenixframework/remove_readme

Removing documentation from README.
use the new travis settings

Using Travis's container-based infrastructure
SEE ALSO:
http://docs.travis-ci.com/user/workers/container-based-infrastructure/
Merge pull request #553 from ma2gedev/use_new_travis_setting

use the new travis settings