Set up first pass at implementing SMS functionality
Set up most of the framework for sending SMS
Cleaned up server testing for sending SMS; should be ready to roll once front-end is set up.
Updated heroku install documentation
Merge pull request #42 from austentalbot/dev

Implemented framework for sending SMS
Merge pull request #43 from quickcall/dev

Implemented framework for sending SMS
Updated README and adjusted callback URL to new server address
Merge pull request #44 from austentalbot/dev

Updated README and adjusted callback URL to new server address
Merge pull request #45 from quickcall/dev

Updated README and adjusted callback URL to new server address