Part of a refactoring to enable storing different interpolators on a Track, to enable cubic spline Tracks
Adjusted the cubic spline to use delegated construction, the first artof makng more coontainer like.
A partial re-factor to make type data more accesible to track classes. This is intended to allow a variety of containers for track data.
Some documentation for the CubicSplineElement.
Split cubic spline into its own file, and added some documentation to it.
Fixa few track tests
removed some dead code from the interpolation algorithm
Converted dead code to a functional check, that fixed a few unit tests.
Fixed remaining track unit tests
Added some docs and forthe cubic and some minor fxes therwse
Merge branch 'master' of github.com:BlackToppStudios/Mezzanine