Add menu action for toggling day and night mode

	modified:   java/info/tellmetime/TellmetimeActivity.java
	new file:   res/drawable-hdpi/ic_action_brightness_high.png
	new file:   res/drawable-hdpi/ic_action_brightness_low.png
	new file:   res/drawable-mdpi/ic_action_brightness_high.png
	new file:   res/drawable-mdpi/ic_action_brightness_low.png
	new file:   res/drawable-xhdpi/ic_action_brightness_high.png
	new file:   res/drawable-xhdpi/ic_action_brightness_low.png
	new file:   res/drawable-xxhdpi/ic_action_brightness_high.png
	new file:   res/drawable-xxhdpi/ic_action_brightness_low.png
	modified:   res/layout/activity_tellmetime.xml
	modified:   res/menu/menu.xml
	modified:   res/values/strings.xml
	modified:   res/values/styles.xml
Show toast only at first run to hint that panel is available

instead of showing the panel at every run for short time

	modified:   java/info/tellmetime/PanelHider.java
	modified:   java/info/tellmetime/TellmetimeActivity.java
	modified:   res/values/strings.xml
Add minutes indicators in main activity and daydream

	modified:   java/info/tellmetime/Clock.java
	modified:   java/info/tellmetime/DaydreamService.java
	modified:   java/info/tellmetime/TellmetimeActivity.java
	modified:   res/drawable/scrubber_progress_horizontal_holo.xml
	modified:   res/layout/activity_tellmetime.xml
	modified:   res/layout/daydream.xml
	new file:   res/layout/minutes_land.xml
	new file:   res/layout/minutes_portrait.xml
	modified:   res/values/strings.xml
	modified:   res/values/styles.xml