WIP New layout for the mobile-json output.

This is a WIP for v2 of curatescape mobile.
Passing back more than one author.
Added sponsor field.
If 'Sponsor Name' is not a valid element, the whole thing was crashing.
More browsing information

This includes more information in the 'browse' view. Specifically,
this obviates the need for the 'show' view, though that will be
maintained (may need to be regressed) to maintain backward
compatibility.