filter node takes IGeometry instead of Geometry.
Merge branch 'javascript-export' of github.com:nodebox/nodebox into javascript-export
Added SVG import code.
Cleaned up graphics code.
a path is by default black.
svg transformations.
Color functionality.
Added color nodes.
A shape's fill color is by default black.
Added generator and filter nodes.
Added centroid function.
Added stack function.
Added a group container.
wiggle node can handle groups.
grid node function: columns and rows arguments were switched.
The bounds of a group are now calculated as well.
Groups can now be transformed as well.
Fixed clamping function.