Increased number of versions that SKMCLauncher now recognises

Version strings earlier than minecraft-1.0.0 weren't being picked up, so I took a look and added to the regex. Now versions from Alpha_1.1.0 are being picked up correctly, even the PCGamer's demo.

 Unfortunately, there's a merge request of mine that probably shouldn't be in the bucket, but I don't know how to get rid of that.

Enjoy.