es_ES: Updated spanish translations

Change-Id: I82bd7a17fc0d16c3443246dfeab9c99752f99194
Merge "es_ES: Updated spanish translations" into cm-10.1
Add back backlight curve adjustment.

Patch set 1-8: Initial commits
Patch set 9  : Shortened strings to better fit Design Guidelines

Change-Id: I1eb370f8911d1c92ef06e553cc1c1be81e83cb95
Merge branch 'cm-10.1' of git://github.com/CyanogenMod/android_packages_apps_Settings into cm-10.1