Add Button Settings, Backlight

Change-Id: I2a13d8d86e4205cf4b9b60a94964deff6bf9fd79

Conflicts:
	AndroidManifest.xml
	res/mipmap-hdpi/ic_launcher.png
	res/mipmap-mdpi/ic_launcher.png
	res/mipmap-xhdpi/ic_launcher.png
	res/mipmap-xxhdpi/ic_launcher.png
	res/xml/preference_headers.xml
	src/com/oct/tentacles/CreateShortcut.java
	src/com/oct/tentacles/SettingsActivity.java
	src/com/oct/tentacles/preference/ApplicationsDialogPreference.java
	src/com/oct/tentacles/preference/SettingsPreferenceFragment.java