Make It Official (WIP)

This is a work-in-progress pull request that makes canon-bootstrap a little bit more official. Up until now, its been mostly @ericmcgregor and I experimenting with a Bootstrap skin. Now that we have a handful of teams (Cloud Intelligence, Mailgun, MyRack) bought into the idea, it is important to start to stabilize the project and enforce some standards. Here's what I've attempted to accomplish with this pull request:

- Make the project public.
- Add a license (MIT) to the project.
- Add project status and usage instructions to the README.
- Add CONTRIBUTING.md to give guidelines for code style and the contribution process. 
- Setup continuous integration with Travis CI. Currently, this simply makes sure the project builds. In the future, we might add other scripts to enforce coding standards such as [csslint](https://github.com/CSSLint/csslint) or [bootlint](https://github.com/twbs/bootlint).
- 

Assuming this looks alright, I'll go ahead and cut an initial release.

Closes #24.