re-work rps_checkNeededPackages allowing required packages to be passed to it.
change the previously unused checkForInstalledAPTPackage to be less verbose and make use of it
added gcc-4.7 as a required package
use rps_checkNeededPackages for installing dependencies. Less verbose, and means we don't have to launch apt-get when not needed
move setting default gcc version to retropie_packages.sh so it is used for both manual commandline building and the dialog gui
Merge pull request #382 from joolswills/depends

Depends
Merge pull request #383 from joolswills/gcc

move setting default gcc version to retropie_packages.sh so it is used f...
Fixed APT-package installation for SNES9X
Merge branch 'master' of https://github.com/petrockblog/RetroPie-Setup

Conflicts:
	scriptmodules/emulators.shinc
Fixed installation of APT packages for FBALibretro
Fix for configuration of RetroArch emulator, enhanced Amiga start script
Minor fix for space checking function, updated binaries-based installation
Fixed binaries-based installation
Fixed ROM directory configuration for emulator Stella
re-add local scope for __desc
correct parameter order for call to rp_callFunction
added g++-4.7 as a dependency
Merge pull request #386 from joolswills/fixes

callFunction changes
Enabled ESC as hotkey in RetroArch per default