Formatting changes in shared records collection parse().
Sketches in exclude-existing implementations of ingestVectorLayers and ingestWmsLayers.
Update map vector layer management tests.
Updates public vector/WMS layer management tests to assert against exclude-existing system.
Fixes un-migrated usage of Record.ID slug.
All editor Jasmine tests nominally updated to assert against exclude-existing.
Fixes edit layer creation Jasmine tests.
Finishes fixing edit layer management tests.
Replaces not.toBeUndefined() with toBeDefined()...
Explicitly reset 'metatata' hash on record collection before each call to parse.
Refactors pagination template such that it's unnecessary to set metadata defaults on the record collection.
Exclude existing finished.