1. Upgraded most projects to .Net4.0 except for TimeSeries.Graphing; required a TeeChart license to build the project.
2. Added MlrInterpolation() to TimeSeries.Math.Estimation. Work-in-progress code to implement MLR interpolation to Pisces and HydrometTools
3. Added AllPossibleCombination Class to TimeSeries.Math.Estimation. This is needed by the MlrInterpolation code.