Import MASShortcut
Import MASPreferences
Set up preferences window nib and classes
Make the preference window accessible
Import JAListView
Display shortcuts preferences
Convert app to use MASShortcut instead of custom code.
Make sure .amethyst overrides in-app settings for now.
Make configuration go through user defaults instead of directly from config files
Add some missing options to general preferences
Add display of floating applications to preferences
Remove entries from the floating bundle identifiers list
Add bundle ids to floating list via preferences.
Fix a typo
Add display of layouts to general preferences
Add behavior to remove layouts
Add behavior to add layouts
Visual clean up and add note about relaunching for layout changes
Fix an incorrect shortcut reference.
Always use the largest possible size for a window.

Closes #168