Fill out the Question model a bit.
Filled out Answer model a bit.
Implement LocalDataStore.

Use Maps to store stuff, for fast lookup.
Fix tests to use LocalDataStore.
Merge pull request #74 from stephenjust/model-code

More Question & Answer model code
Merge pull request #75 from stephenjust/localdatastore

Localdatastore
Merge branch 'master' of https://github.com/CMPUT301F14T14/Project into UserAssign