Add runcommand.sh autodetect HDMI support, as discussed in issue #173.
You might want to test this on a non-HDMI setup - I don't have one, but it should work...
New arguments are now 1 = auto, 2 = off, 3 = force on.
Merge branch 'master' of https://github.com/petrockblog/RetroPie-Setup

Conflicts:
	supplementary/runcommand.sh
EmulationStation now builds with g++-4.7 and CMake.
Fixed setting CXX incorrectly.
Merge pull request #189 from Aloshi/master

Build EmulationStation with CMake and g++-4.7