Make Calculate[]Spline function interfaces uniform

[ClarkMcGrew]

The Calculate{Monotonic,Compact,Uniform,General}Spline functions all define an input parameter named dim, but it means different things for each of the functions. Specifically

1. CalculateMonotonicSpline -- dim means the number of knots
2. CalculateCompactSpline -- dim means the number of knots
3. CalculateUniformSpline -- dim means the number of elements in the input array (it is 2+2*knots)
4. CalculateGeneralSpline -- dim means the number of elements in the input array (it is 2+3*knots)

The least surprising interface will be to have dim always be in the input array size. That would mean that for Monotonic and Compact, dim will be changed to be equal to (2+knots).

[ClarkMcGrew]

I don't think we should make 1.7.0 wait for this and it involves a lot of new testing on the GPU which is already pushed to 1.7.1. It's a janitorial code enhancement, so it doesn't seem like high priority.

[riccioc]

OK, I've moved it to 1.7.1