Merge pull request #928 from birarda/assignment

couple of bugfixes for local stack assignment, UUID created with assignment
add debugging for assignment send and remove a useless cast
Fix for copy/cut/paste single voxel leaves.
Get rid of qDebug statements in VoxelTree.cpp.
Merge pull request #929 from birarda/master

two small assignment changes
Merge pull request #930 from LionTurtle/master

Fix for copy/cut/paste single voxel leaves.
add handling of Agent assignments to Assignment, DS, AC