cLock: added Polish translation

Change-Id: Icf4af10cb17790d49f2e6102cbbc1e9b75d7c14e
removed hardcoded reference to stock cm calendar app; ask for calendar app instead

Change-Id: Ie82a94efa49b282570d72119cd0ec4fe111e52dd
Merge "cLock: added Polish translation" into cm-10.1
Merge branch 'cm-10.1' of github.com:CyanogenMod/android_packages_apps_LockClock into cm-10.1