* set minSdkVersion to 21
* use elevation instead of additional views for shadow
* clean up code occurrences
* remove drawable compat code
* remove no longer needed resources
* remove unneeded android:clipChildren="false"
* Revert "remove no longer needed resources"
This reverts commit 67a4d6f8d87b3f116b95d90dfb48f350d342f503.
* remove no longer needed resources (this time the right ones)