Can provide an array of basis functions for bezier curves (ie with no
internal knots. Other cases will need to be handled separated later.)
Added tests for genearating basis functions for linear knot vectors with up to two internal values, and for bezier equivalent quadratic knot vectors
Added test case for evaulatuing spline basis functions for quadriatic knot vector with one internal knot
Added quadratic degenerate knot vector test cases
Merge pull request #4 from iain-peddie/all-basis-functions

All basis functions