In order to do this correctly:
Removed duplicate includes
Fixed mpd functions to accept mpd_s instead of information
Freed mpd.h of any need to include conky.h (mpd.c still includes it for the constants)
git-svn-id: https://conky.svn.sourceforge.net/svnroot/conky/trunk/conky1@1154 7f574dfc-610e-0410-a909-a81674777703
