About screen: Put the credits in an html file
About: make the current song title marquee
New version 1.3.1
Added proguard mapping for 1.3.1
Merge branch 'master' of https://github.com/caarmen/PalidaMuerte

Conflicts:
	assets/credits.html
	src/ca/rmen/android/palidamuerte/app/about/AboutFragment.java