Contributed_Map_Layers_API v1

**NOTE** This is a collection of new APIs created for the purposes of Posting Contributed Map Layers to MJD. They should be considered *ALPHA*, and will evolve as implementation and testing proceeds.

**NOTE** This is a collection of new APIs created for the purposes of Posting Contributed Map Layers to MJD. They should be considered *ALPHA*, and will evolve as implementation and testing proceeds.