Paris Check-all-that Apply problems in MSAdmin

[IvonArroyo]

This involves:

• Saving the data from problem into database between a few tables (problem, problemanswers table,etc.)
• Previewing/loading the problem from that saved data in the DB
• Creating the interface features necessary to dynamically create these kinds of problems.
• Assessing the correctness of the answer in MathSpring, after hitting the submit button.