Added load screen and music

the music plays throughout the menu selection on another thread
test

test
Merge branch 'master' of https://github.com/ryantzor/Reptar

Conflicts:
	res/values/strings.xml
	src/com/example/reptar/Organism.java
	src/com/example/reptar/Plants.java
	src/com/example/reptar/TRex.java