Backport Superuser from CM10.1

Edited to remove multiuser code, otherwise it's the same as CM10.1

Not all devices are capable of runing CM10.1, so it makes sense to
bring the security advantages of this back a generation.

Edits to the Superuser app can be found at:

https://github.com/LegacyDroid/android_external_koush_Superuser
https://github.com/LegacyDroid/android_external_koush_Widgets

Change-Id: Id7e29b2b87c33102fa0ebad3cc78c43cb6a2f76d
Add the Lock Clock widget settings