CORE: use enmity list at mob death to determine TH lvl applied to drops, cleanup obsolete TH related stuff

Conflicts:
	src/map/utils/battleutils.cpp

Conflicts:
	src/map/utils/battleutils.cpp
CORE: add maxTH to enmity object, track's highest lvl of TH applied by enmity owner
cleanup obsolete TH function
Merge pull request #167 from maxtherabbit/master

 CORE: use enmity list at mob death to determine TH lvl applied to drops…