Improve get_icon_names function
Improve get_icon_names function

As this function gets more and more important, it now checks for
overrides the user has made and prints these icons instead. At least
unless the first parameter is not set to "original". Then it will print
the default icons.

bhilburn/powerlevel9k,shibumi/powerlevel9k,dritter/powerlevel9k,shibumi/powerlevel9k,rjorgenson/powerlevel9k,dritter/powerlevel9k,natemccurdy/powerlevel9k,rjorgenson/powerlevel9k,natemccurdy/powerlevel9k,bhilburn/powerlevel9k