initial version of the collisionfilter done
beginning to improve worldtreenode
bullets ignore shooter
fixed collisionfilterable
added missing files for collision_filter
fixed bit-querying
fixed indentation, cast of worldobject to collisionfilterable and tests
Merge branch 'master' into collision_filter
merge with master
strengthen voxels, improve damage-calc
small indentation fix, bulletspeed for da funz
increased voxel-hp a bit
Merge remote-tracking branch 'origin/hf_windows_tostring' into reasonable_damage
merge with master, implemented some PR suggestions
Merge pull request #162 from voxelinc/collision_filter

Collision Filter
merge with master
Merge pull request #166 from voxelinc/reasonable_damage

Reasonable damage
merge with master, adjusted bullet speed and voxelHP a bit