Reviewed WRL files before the data were posted

Nat suggested that the reference system that was used for deriving the model
be included in the documentation


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Working with DSK models

Learned the basics of the Alpha version of the SPICE shape model routines

Performed the main high level SPICE routines on a couple of test models and
compared them to the results from the shape model programs I've written

Able to:  
    Load and access the various models
    Compute the Sub-spacecraft point (cart, lat/lon) and determine which facet
       it intersects
    Compute the Sub-solar point (cart, lat/lon) and determine which facet
       it intersects
    Compute the intersection (Cart, lat/lon) of an arbitrary ray with the
       surface, and determine what facet it intersects
    Compute the illumination angles for arbitrary locations on the surface

    Note: Didn't try terminator/limb calculations, because rosetta violates
       the ellipsoidal shape model 
 

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Basic test:  compare shape model to NAVCAM images  (Used WRL files)

Used SPICE to compute the s/c orientation and sun orientation WRT to the
  shape model

- Works pretty well
- Reproduced the approximate orientation seen in images
- Note: the orientation is different in SPC and MSPCD files
   -- coordinate system is different
   -- MSPCD seems to reproduce images better than SPC

Also, found that the geometry in the image headers appears to be incorrect 

Example image from "2014 Aug 21 14:07:18.10"