Separate the AppTheme class from Accent as they aren't related
Remove the obsolete internal and private methods and use our new methods in the public deprecated ones
Fix a typo
Methods that return or change both, the application accent and theme, are now referred to as "AppStyle"
Fix the unit tests
Added some tests to disprove my assumptions
Point the user to the alternative property/method

Also removed an obsolete property that was never actually exposed
Fix naming
Merge pull request #1212 from MahApps/accent-theme

Refactor the ThemeManager API