Added CachedPostManager and PostManager
Added PostController
Added MainFragment and associated xml
Changes to PostManager, PostController, and CachedPostManager
Added auto generated posts
Added default Objects from Bens Branch
Moved file comments to top of file
Added InvalidPostTypeException
Implemented all model classes expect UserProfile according to UML specs
Made changes to some test cases
Started work on PostFragment
added question_fragment layour and some string resources
Worked on PostFragment and QuestionFragment
added support for answers button and textfield in question fragment
Rebased bensbranch with master
Merge with MainFragment
Merge branch 'PostManagerBranch' of https://github.com/CMPUT301F14T08/StackUnderflow into bensbranch
Merged everything to get the app to run. Saving not currently implemented