improved singleton z handling, removed possible deadlock
more abstraction to acommodate lazy CC
Merge branch 'master' into OpLabelVolume-optimization
Merge branch 'master' into OpLabelVolume-optimization
make sure the 'right' blockedarray version is used
make sure the 'right' blockedarray version is used (for tests)
Merge branch 'master' into OpLabelVolume-optimization
Merge branch 'master' into OpLabelVolume-optimization
made OpNonLazyCC interface public
use new blockedarray
Merge branch 'master' into OpLabelVolume-optimization
Merge pull request #127 from burgerdev/OpLabelVolume-optimization

OpLabelVolume optimization