Some minor cosmetic changes

	modified:   src/info/tellmetime/Clock.java
	modified:   src/info/tellmetime/PanelsHider.java
	modified:   src/info/tellmetime/TellmetimeActivity.java
	modified:   res/layout/activity_tellmetime.xml
Widget gets the same highlight color as the main activity

	modified:   src/info/tellmetime/ClockService.java
	modified:   src/info/tellmetime/TellmetimeActivity.java
	modified:   src/info/tellmetime/WidgetProvider.java
Activity keeps screen on

	modified:   res/layout/activity_tellmetime.xml
Removed unnecessary dimens

	modified:   res/values-v14/dimens.xml
	modified:   res/values/dimens.xml
	modified:   res/values/styles.xml
Moved writing and reading SharedPreferences to separate threads

	modified:   src/info/tellmetime/TellmetimeActivity.java
Changed 'sp' to 'dp' in widget text size

So widget size is independent from font size scaling factor, always fills whole reserved area and doesn't spill with huge font.

	modified:   res/values-v14/dimens.xml
	modified:   res/values/dimens.xml
	modified:   res/values/styles.xml
Changed 'infotext'

	modified:   res/values/strings.xml