Dialer: Proposal to amendment the look of dialer to fit kk

add changes fits Slim Dark theme color scheme

screen http://www.elelinux.se/elelinux/dialer.png

PS2: Added more options make it themeble for theme chooser

* Dialer background slightly darker
* Digits change the font

screen http://www.elelinux.se/elelinux/dialer_4.png

Change-Id: If393f0e2b57f3c55025dd029c86cb6a0bf24d4a3

Conflicts:
	res/values/colors.xml