added population data back for SIMPLE_CHILD_ARRAY implementation
moved blended _children union into BLENDED_UNION_CHILDREN
clean up voxel server stats page
added SIMPLE_EXTERNAL_CHILDREN mode, which saves on most of our child VoxelNode children storage without being too complicated
Merge pull request #1137 from ey6es/ick

Fix for arm on old skeleton.
add mutex for _nodesRequestingJurisdictions to fix crash
Merge pull request #1139 from ZappoMan/voxelnode_memory_savings

VoxelNode memory savings
Merge pull request #1138 from ZappoMan/bugfixes

add mutex for _nodesRequestingJurisdictions to fix crash
Normal map support almost there.