Add config for travis-ci.org.
Force travis to install pyserial.
Install USB backend in CI.
CI already has libusb - still segfaulting, though.
Disable trivial USB test case to get suite running on CI.
Add CI notifications to HipChat.
Mention USB backend when installing.
Remove currently empty docs section.
Remove unnecessary import that breaks dashboard in Python 3.3.
Use double backtick for code highlighting in rst.