[GSoC2016]Spline geometry code reviewing
I have made the following changes:
- Modified the basis function calculation and the corresponding mapping of BSpline geometry. This is of high priority for reviewing.
- Created an elementary NURBS geometry class. It's almost the same as 1 with additional weight property.
- Implemented some interface functions of B-Spline geometry. Not complete yet. Low priority for reveiwing.
Thanks for your time in advance.