Fixed Tiger Cannon Damage

Issue identified and solved by Michieru, Thanks!

Signed-off-by: shennetsind <ind@henn.et>
HPM: Itemdb.c Interface

Fully Integrated. Closes #110

Signed-off-by: shennetsind <ind@henn.et>
HPM: Battleground.c Interface

Fully Integrated. Closes #97

Signed-off-by: shennetsind <ind@henn.et>
Merge branch 'master' of https://github.com/HerculesWS/Hercules
Merge branch 'master' of https://github.com/HerculesWS/Hercules into ghbb

Conflicts:
	src/map/itemdb.c
	src/map/itemdb.h