Hook up Travis CI

[stevenbenner]

Now that we have a Grunt build system in place (see: issue #2) it would be nice to have a continuous integration server hooked up. Travis CI is probably the best choice because it free and easy to hook up to GitHub projects.

Process:

• Add a Grunt task for Travis.
• Add Travis configuration file to the repository.
• Connect Travis to the repository with a service hook.
• Add snazzy build status image to the project readme.

[stevenbenner]

Travis CI has been hooked up.