GRAILS-10838 - add some support for auto discovering StructuredBindingEditor instances
remove extraneous import statement
GRAILS-10838 - add GrailsWebDataBindingStructuredEditorSpec
GRAILS-10838 - add convenience method for extracting structured property values
Merge branch '2.3.x' of github.com:grails/grails-core into 2.3.x