Settings: statusbar clock customization + initial interface + color picker

- added slims clock and date customizations for status bar
- added our own modded marginov color picker which we use as default
- added initial interface settings. A bit empty currently but we are on
  alpha and it will be filled fast for sure. Added as well two empty
classes
  due that we need them later

Originally by kufikugel. I just ported to 5.0

Change-Id: Ife03bc55705e9576edcca030185bdd2349e9e270

Conflicts:
	res/values/slim_arrays.xml
	res/values/slim_strings.xml
	res/xml/dashboard_categories.xml
	res/xml/status_bar_settings.xml

(cherry picked from commit 36ee818b49543c60d258e917e936106b4e94babb)
Change icons to reflect material design, and change to SwitchPreference.

Change-Id: I6befae601b2cb41420a875927f1ff2499ddfe7f1

Conflicts:
	src/net/margaritov/preference/colorpicker/ColorPickerView.java