Added jquery to hide and show the results area of the play page

Passing user guess and real answer from jquery to sinatra using JSON
Modified the /deck/result route to take JSON elements

Passed user guess and real answer to the #check_guess method

return the result, user_guess and real_answer back to jquery using JSON
Added a result-table div that returns the user's guess and the
real answer
Changed the #check_guess method in the Round class to return
'correct' instead of true and 'incorrect' instead of false.

This will then be passed into a JSON object to be returned to jquery
and displayed on the page.
Upcased the return from the #check_guess method in the Round class.

Cleaned up the view to make it look better and added some ideas to hook to from JS.

Added CSS to change color to red for incorrect and green for correct.

Hid the submit, disabled radio buttons and changed color of correct message after submit button is clicked.
Merge pull request #16 from ameliapadua/AJAX

Ajax