Conflicts:
	nodes/modifier/mesh_separate.py
Merge branch 'development' of https://github.com/nortikin/sverchok into development
last commit to this branch for a while

proceeding to dev-evalknieval-node branch
Vector Math2 replaces Vector Math
polygons centers is ok
Merge branch 'development'
Removed math2 menu entry
Preliminary support for node groups
Wrong place
Merge branch 'vec2-test' of https://github.com/nortikin/sverchok into vec2-test
Reset node_tree work - wrong branch
Merge pull request #282 from nortikin/vec2-test

Vec2 test
Merge pull request #283 from nortikin/master

sync ui-sep with master