Updated start command for mupen64plus
de-duplicate setting of dialog backtitle everywhere - use a global variable and set it in retropie_setup.sh once
Updated installation of openMSX
Updated ESConfigEdit updating behavior
Updated module dgen: dependencies, sources, installation
Updated download URLs, added directory creation calls
Enhanced installation of SDL 2.0.1 binaries, ES installation
Silenced gitPullOrClone
Added menu "EXPERIMENTAL"
Merge branch 'experimentalmenu'