add comments
merge
POST data now expects data in  "data " object, and checks for nesting
Merge branch 'v1.0' of gits:city_sdk into v1.0
no params for make_hash, query for NodeDatum.make_hash, and owner creation/update
added TODO
dependEnt
fixed typo: dependency!
virtual layers
dependencies
removed unused functions and uses serializer precision
do not allow unknown file extensions
e for a
renamed/removed columns
use new Layer.id_from_name function which returns only one ID per call
fail when layer not found
started Layer.write, and disabled layer.names_from_ids
Merge branch 'v1.0' of gits:city_sdk into v1.0

Conflicts:
	utils/filters.rb
virtual layers
support regex url params for filters