Implementing Utilities for Moving Between Lat/Long, Geocentric and Direction Cosine Points

[rfalford12]

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Implement utility methods for easily moving between three coordinate systems or point representations:

• Geocentric: 3D point - vector from the origin (0, 0, 0) to point on the surface of a spheroidal model of the earth
• Geographic Point: Latitude/longitude
• Direction Cosine "Point": Unit Vector representation of the 3D point (or can also be derived from the 2D point)

[dsmiley]

@rfalford12 @varsis Please collaborate together on a shared set of classes that meet your mutual needs (both for this issue and perhaps another or two similar GH issues). You two should be able to commit to each other's repos (i.e. push) if you grant each other permission. I admit I'm not well-versed in GitHub collaboration but I think this makes sense although it may be easier for one of you to host the new stuff such that there needn't be cross-pushing; just one-way. I dunno. Experiment and figure it out -- it'll be a nice learning experience.

[rfalford12]

Ok - that sounds good. Added chris as a collaborator