Revert "Give the drawer background more definition instead of just a solid color."

This reverts commit 424a6134ecd420ebd72c29966d741885532ed7de.
Revert "Introducing the PreferenceDrawerActivity which makes use of the new navigation drawer UI google has introduced in updates to many of their apps.  This relies on headers which are displayed in the drawer and preference fragments as the main content."

This reverts commit 730b226c3e7b518cd0763eeb1fb35b3f96248959.
Revert "Add DrawerLayout and ViewDragHelper classes found in the new support library.  These classes have been modified to work with the current framework and no need for any support or compat classes."

This reverts commit f75235d4b94dcb9bd09886054161e44da89149c1.

Not many people liked this it was getting very annoying.