basic android support added, for shits and giggles

basic android support added, for shits and giggles. this will only launch the steam app. no settings have any effect - seems like closing apps on adroid requires root access, atleast on cm11 over adb, plus is there any point on android (atm)?
Merge branch 'master' of github.com:teeedubb/teeedubb-xbmc-repo
removed android portion from steam-launch.sh - android mounts sdcards as 'noexec' so its not possible to run the script
added android steam launching to default.py