changed default db name to 'citysdk-ld'
renamed name filter to title and added pg_trgm installation instructions to README
better error messages for PG::UniqueViolation
layer=* works, and is default for single object queries
aded space
move objects with data to layer -1 on layer/owner delete
removed double underscore in db constraint
added env parameter in migrations script
removed old CURL comments, added regex helper, added single object delete call
removed format setting, API now uses Accept headers
simpler name constraint regex
new tests!
code to move objects to layer -1 (and remove when orphaned)