don't update metadata if it's undefined (to not raise unnecessary events)
CDB-358 #refs added cartocss to wizard for simple wizard
refactor to avoid duplicate code
fixed specs
CDB-393 force core in the UI
fixed updating wizard_properties without unsync data from the wizard generator
CDB-377 fixed updating wizard_properties without unsync data from the wizard generator
Merge branch 'feature/2281_metadata_sql' of github.com:CartoDB/cartodb into feature/2281_metadata_sql
Merge branch 'feature/2281_metadata_sql' into release/2.1.3.4.2