Merge pull request #12 from stevekinney/master

Set up basic support for SMS and user sessions.
Merge pull request #13 from stevekinney/master

Add some mock tasks; remove Grunt dependency
Allow tests to be run without defining Twilio environment variables.

This makes development easier, and also paves the way for easy Travis CI
integration.

It might be cool in the future to add a mock Twilio API, so that folks
can develop offline if needed, and test suites can run superfast!!
Merge pull request #15 from toolness/master

Allow tests to be run without defining Twilio environment variables
Set up task routes
Resolve conflicts
Add index of routes
Add route for tasks list
Remove comma to make valid
Fix lint errors
Add basic API documentation
Simplify task fetching; write basic tests
Stub out tasks API