es_ES: Added spanish translations

Change-Id: I41ecda8dd6d65bd0efa66bae447ba20c2a5d5445
Merge "es_ES: Added spanish translations" into cm-10.1
Add back backlight brightness curve adjustment.

Change-Id: I58408111d6366a281303afb469d78588ae88d275
Merge branch 'cm-10.1' of git://github.com/CyanogenMod/android_frameworks_base into cm-10.1-n7