NURBS-Python v3.0 Beta 2

• Added visualization module.

Visualization module is an optional module for NURBS-Python. In other words, you don't need to import it to evaluate surfaces and curves.

The visualization module currently includes a base class VisABC which can be used to create new visualization components, and VisMPL component that implements Matplotlib for 2D and 3D plotting.

Please see the following for usage examples:

• ex_curve01.py - 2D Curve
• ex_curve3d01.py - 3D curve
• Surface visualization component is also complete but currently there are no examples. Please check the examples repository for more details.