Completed proper merge of mobs mod

- Merged api :
	- little tweaks on yaw computing system and position handling when blasting
	- Centralisation of the explosion function used by both dungeon masters and
	  creepers : checks are made differently but still present in the function
- Merged dungeon masters
- Changed type of creepers from kamikaze to explode
- Tweaked a bit rebase script

other_things/scripts/rebase_active_branches.sh

@@ -7,6 +7,7 @@ for branch in $( git branch ); do
 	if [ branch != "master" ];
 	then
 		git checkout $branch
+		git pull origin $branch
 		git rebase master
 		git push -f origin $branch
 	fi