Implemented ability to save data from Point Configuration LTI Tool into back end

https://jira.ets.berkeley.edu/jira/browse/CYB-78
https://jira.ets.berkeley.edu/jira/browse/CYB-81

1. Set up an AJAX http post on 'save' button click
2. Created the Rails Route to receive the data 
3. Set up the Points Configuration controller, set up function to parse data
4. Set up the Points Configuration model, set up function to save data