changed the back button to back out of the app when in the connection fragment or when the menu is open, and to open the menu otherwise
Merge branch 'master' of https://github.com/TheLastCrusade/SoundStream into back_button_navigation

Conflicts:
	SoundStream/src/com/lastcrusade/soundstream/CoreActivity.java
Merge pull request #161 from ejohnson44/back_button_navigation

back button change