Bring animations more inline with material design

Enable animation easing between activities
Eliminate fade to give card stack feel
Update animation durations
Fix drawer back button behavior
Darken hamburger
Add gradient to drawer list items

Properly select the drawer list items
Clean up
Match password's EditText font to username's
Done on keyboard submits login form

Spinner shows up during whole login process now
Merge pull request #6 from swiggins83/ui

More UI