[WIP] Extend collocation methods to use DataInterpolations.jl

[avik-pal]

Follows from discussion on Non-Smooth Collocation Methods in #370

[ChrisRackauckas]

Okay, this is interesting. It seems that the DataInterpolations PR broke master and it's the same error error. The test in question wants to use the derivative w.r.t. the data of the interpolation.

https://github.com/PumasAI/DataInterpolations.jl/blob/master/src/DataInterpolations.jl#L24-L27

That DoesNotExist() I think should be interpreted as the derivative of the output w.r.t. the parameters. The thing acts as an array, https://github.com/PumasAI/DataInterpolations.jl/blob/master/src/DataInterpolations.jl#L9-L10 so I think it just needs to send back an array of mostly zeros and the local stencil coefficients in the right place.