Debug function that draws hordes on the overmap.

Replaces the old horde debug functionality.
Draw the target of the horde as well.
Use pattern matching to identify zombies in zombie speed mods.
Merge type matching in LUA mods.
Merge horde debug map.

Conflicts:
	src/game.cpp
Merge remote-tracking branch 'CleverRaven/master'
Console free tiles mode, also "-lfreetype -lpng -lz" are used from SDL layer.