Support all known DPI values

Extend the dpi range to complete the table, as you can see here xxhdpi goes from 480 to 639 than becomes xxxhdpi at 640
http://developer.android.com/guide/practices/screens_support.html

Support the devices that use xxxhdpi (e.g LG G3) or people who use a modified DPI higher than 480 in build.prop to get rid of the "unknown" value being returned

Change-Id: Iac19ef51a840cf118f1a72fc5bf5f3406e042282
Fix German translation

Change-Id: Icfa42f11fffad79fc99657b9883d409e27945998
Modify the Development shortcut help text

Change-Id: I4e41a1df4b929630e0f759812ab0b53280a4d722
Merge pull request #48 from LiquidSmooth/kitkat3

marge pull request