Removed references and code connected to hemesh lib.
Rename Stroke.brushStyle Stroke.style
Added x(), y(), z() methods to Stroke for integration with Shape3D PathTube
Add PApplet to Stroke and Drawing for PathTube integration
implemented Stroke.createMesh()
Create meshes and display them.
Recreates the mesh for each new point added to stroke.
Added frag and vert shader that indicates depth of users hand.

Also tweaked default.gml color
Merge branch 'Mesh-Shapes3D'