Give an option to read data directly off the disc when compiling

[ChrisFratz]

I know I just posted an idea a couple days ago on this board, but another one just popped in my head. When I first compiled the game I was a bit disappointed that I couldn't just put the disc in my drive and let the launcher read the data straight off it, requiring me to rip the contents to an ISO first. I get that it would be slower, but there's a part of me, the thinks it would be fun to be able to just do it and hear the drive spin up. Plus, it would remove an extra step for people that have a black-label copy on hand instead of a backup they made while having the actual disc just put away in storage or something.