mupen installation + typo in mupen's config + miscellaneous items

I've tested the installation of mupen64plus on a scratch installation -- it's fine. No need to do any tricks with apt-get. --> corrected in emulators.shinc

The rice plugin does indeed seem to crash. Glide and Anarchoind seem to work. Rice got only used because of a typo in mupen's configuration. --> see below

This should now definitely close #86.

I made some smaller amendments for the new "Auto" item in the resolution, for unnecessary installed packages and too verbose terminal output.