Pre-updated front end code

Will change a bunch when someone finally merges codys code.
Posting a solution, dialog boxes

The code for posting a solution is up and running. I created a couple
schemas for dialogue boxes, we should all use these for consistency.
Cleaned up some random other files. NOTE: we still need to contact
question services on startup and on exit.. i did not add code for this
yet, but will on next commit (posting questions)
fixed some merge conflicts

BROKEN
Merge conflicts fixed

Functional
added code for posting a question
merge conflicts resolved
Code for posting a question functions, but looks bad
r
Still ugly
made it look prettier, fixed dialog bugs
Deleted repeat lines in dimens.xml
added model tests
Code review change
Implemented deleteQuestion, switched getUserId to a POST request
fix build target
Added functionality to select by Category in Slide-Menu
Fixed persistent exception when no Difficulty is selected
Merge pull request #128 from bkng/master

Fixed exception caused by empty Difficulty setting
Merged Justin's changes
Merged changes from Pull Request 128