Better detection of graphics mode on Android.
This fixes crash when resuming app after sleep on HTC One X (EglException: MakeCurrent failed with error 12297).
Throwing NoSuitableGraphicsDeviceException if failed to create frame buffer.
Merge pull request #2627 from Andreyul/android_graphics_mode

Better detection of graphics mode on Android.
Refactor of build script to move installer and docs out of the code building target.
We need to keep the default "build" target.
Default build target is now "build_installer" which will cause everything to be built.
Hack to allow our target changes, but not require immediate changes to the TeamCity build steps.
Merge pull request #2821 from SickheadGames/build

Build Script Improvements