Added pointer to current song in playlist
 Changes to be committed:
	modified:   src/MHMC.hs
	modified:   src/MHMC/Display.hs
	modified:   src/MHMC/MPD.hs
Added ability to choose a song to play from the list. Changes dependency versions
 Changes to be committed:
	modified:   mhmc.cabal
	modified:   src/MHMC.hs
Changed some UI features
 Changes to be committed:
	modified:   src/MHMC/Display.hs
	modified:   src/MHMC/MPD.hs
Updated code to take into account new libmpd.
I plan on actually finishing this project now
TODO: Convert ugly loop parameters to an RWST
 Changes to be committed:
	modified:   mhmc.cabal
	modified:   src/MHMC/MPD.hs
Initial dev commit. Will start rebuilding functionality from the basis of the new RWST.
 Changes to be committed:
	modified:   mhmc.cabal
	modified:   src/MHMC.hs
	new file:   src/MHMC/RWS.hs