Query by check boxes.
Query by checkbox/select/radio.
added: model: rename of category
added: move of category node. test is not yet written.
trivial
Merge branch 'enhancement/category-rename' of https://github.com/snt/store into enhancement/category-rename

Conflicts:
	app/controllers/ItemMaintenance.scala
	app/controllers/ItemQuery.scala
	app/models/Item.scala
	app/views/query.scala.html
	app/views/queryByCheckBox.scala.html
	conf/routes
	test/functional/ItemMaintenanceSpec.scala
	test/models/CategorySpec.scala
	test/models/ItemSpec.scala