Removed copyrighted material and moved some files to CoolSongs.

The following files are covers and can not be relicensed under an open license. 

Infinity - Guru Josh
Final Countdown - Europe
Song of Kotetsu Jeeg - by Ichirou Mizuki with Columbia Yurikago-kai and Koorogi '73

This would be a 'no go' from the original artists, publishing companies and also Debian/Ubuntu among others. I removed them from the project. I think they are still on the LSP anyway. The remaining files, MichaelKuhn-Mondscheinsonate.mmpz and Thaledric-AwayFromBoobaloo.mmpz, I relocated to CoolSongs. 

My first pull request ever...   8)