Move plugins.cfg to user folder.

This moves the ogre config file to the user folder alongside the ponykart config. It is also generated if it doesn't exist, based on the platform. This allows the "media" folder to be symlinked into the build folder instead of copied. LKernelOgre.cpp:56 seems to do something special for windows debug builds, so I left it alone.

Also, added a LOOPSTART metadata tag to the music so that it loops now.