All defvars/defparameters was moved to a new file. For the great justice
Level of detail
voxel-octrees is now portable
Check if tree is balanced
Some notes
ray-tree-intersection also returns path to a leaf
LOCAL-RAY-TREE-INTERSECTION
Expanded doc string
No need to carry all commented junk from older versions
calc-sqr-metric returns a square of usual Euclid metric. It's easy to understand, what this will not harm the test suite
TODO