Added cursor support, as in being able to scroll the help menu. Up/Down arrow keys stuff
 Changes to be committed:
	modified:   src/MHMC.hs
	modified:   src/MHMC/Display.hs
Added playlist listing artist support
 Changes to be committed:
	modified:   mhmc.cabal
	modified:   src/MHMC.hs
	modified:   src/MHMC/Display.hs
	modified:   src/MHMC/MPD.hs
And song title support
 Changes to be committed:
	modified:   src/MHMC/Display.hs
Tabbing changes, added columns, and backspace ability
Changes to be committed:
	modified:   src/MHMC.hs
	modified:   src/MHMC/Display.hs