Release Candidate 2

So with this release, after over 24hours of work, I made some changes to the core logic, added some new features, and TOCs, as well as began the process to allow addon packs to be installed alongside the installer for scenarios. While I did add some safety checks and streamlined code, I want to mention a few things that drove me insane with frustration:

"xdelta using a %xdelta% enviornmental variable without letting me know; so using a variable of "%delta% broke it every time ugh!"
"echo A|7z.exe doesn't work, so had to remove the pipe and add -y at the end."

^^^
would have cut my time by half had i figured it out, bleh!

#known global bugs:
not tested 32bit support
not tested < win 8
German patch txt MGE (yawns)

#currentbugs:
addons logic extracting but failing to extract properly to destination -perms?

#oldbugs:
reverted some nocd patches (thanks github)
x64 patched exe for MGE not creating (minor)
Wrong track listing for MGE (off by one track, track1 issue)
Installer back button borked mostly (engine issue, can't fix)
Just x64 patched exe's not creating (minor)
MGE modern files installed always (ugh)
TOT patch exe not applying (nocd + extras) (minor annoying)
Start Menu isses between solely MGE or TOT (very minor)
Music in installer stops early (QOL, enhancement fixed in next version)
Map maker MGE wrong exe (whoops)

Full Changelog: RC1.f.6...RC2.f.0