Implement Bezier Curve Offseting

[Shkyrockett]

Offsetting Cubic and Quadratic Bezier curves will eventually be needed.

• Line Segment
• Quadratic Bezier Curves
• Cubic Bezier Curves

Potential References

• https://pomax.github.io/bezierinfo/
• http://microbians.com/math/Gabriel_Suchowolski_Quadratic_bezier_offsetting_with_selective_subdivision.pdf
• http://web.mit.edu/hyperbook/Patrikalakis-Maekawa-Cho/node222.html
• http://www.cplusplus.com/forum/general/104087/