Add InterpolateAtArcGISPoints() function to CMEMSARCOArray

[jjrob]

Our design pattern for gridded oceanographic data products is to create a class derived from GeoEco.Datasets.Grid and then implement these functions:

1. CreateArcGISRasters()
2. CreateClimatologicalArcGISRasters()
3. InterpolateAtArcGISPoints()
4. CreateCurrentVectorsAsArcGISFeatureClasses() (if appropriate)
5. CreateCayulaCornillonFrontsAsArcGISRasters() (if appropriate)
6. CannyEdgesAsArcGISRasters() (if appropriate)

Currently, 1, 2, and 6 have been implemented. We should also implement 3, InterpolateAtArcGISPoints()

[jjrob]

Implemented in v3.1.0