Add scripts that install media codecs

[alexandru-balan]

It will be helpful to create another batch of scripts that install (optionally) the proprietary media codecs. That way the users that opt in will be able to watch and stream media with the mp4, mkv, etc extension.

Mainly they will need to install gstreamer and ffmpeg. At this moment all distros that I made scripts for have precompiled packages with the codecs and ffmpeg, except Clear Linux.

Main focus :

1. Fedora rpmfusion installation and media codecs installation through terminal
2. Clear Linux ffmpeg building and installing (maybe I will provide a precompiled binary because this acript already takes forever to finish). Building ffmpeg wold take maybe 5 times more than it already takes.
3. Solus is straight forward, everything is packaged
4. Arch is arch.