some initial refactoring
renamed Voxel::mass to Voxel::normalizedMass, since the real mass depends on the transform of the cluster holding it
calculate mass and center on the fly, no more finishInitialization
made tests compileable, some fail still
fixed tests
testing aabb-shrinking
alterCell() now receives a booleanto determine between addition and removal
added on-altering voxelcluster-gridAABB calculation
merge with master
merge with master
first series of changes from pr-comments
Merge branch 'master' of https://github.com/voxelinc/voxellancer into lazy-recalc-on-cluster-change
fixed build
merge with master
Merge pull request #205 from voxelinc/lazy-recalc-on-cluster-change

Immediate recalculation of Mass, Center and AABB on cluster change