flatshade UI dark for CM12

goal of flatshadeUI for CM12 is to fix most of the little annoyances and inconsistencies in material design, and to bring a fresh breath to some material elements that might seem a little stale by now ;)

list of themed elements:

- statusbar and navbar
- lockscreen
- notification shade
- settings
- contacts
- dialer
- messages
- google messenger
- gmail
- email
- inbox
- gallery
- keyboard (aosp and google)
- cm eleven
- cm file manager
- google plus
- google play music
- hangouts
- youtube
- instagram
- twitter
- whatsapp
- over 300 custom icons
- custom composed ringtones and notification sounds
- photography wallpaper