Merge pull request #100 from ly29/master

ConvexHull
Merge pull request #101 from ly29/master

Delete Loose, Adapative Edges beta
Merge pull request #102 from ly29/master

Fix bug in levelsOflist
KDTree node requires 2.70

So we bump the version number.
0.2.8
Create node_KDTree.py

it's still rough, but is capable of producing neat features.
Update node_s.py
added KDTree preliminary node.
Update node_CentersPolsNode.py
Merge pull request #43 from nortikin/master

sync