Splits Install into Server or Desktop

The former install script I would only use on an Ubuntu desktop environment
because there are some GUI tools I commonly use in the deskop. Needed a
script that was customized for server, since I don't use those GUI tools on
a GUI-less server.
Updates README.md

Now there are separate install scripts for either desktop and server and
the README.md is updated to show the different commands.
Colors Prompt Yellow Bold

Wanted an easy way to distinguish commands from output.