In the migration framework, fix queries for Archetype objects, where only
  interfaces are used to skip brains with no or Dexterity meta_type. In some
  cases Dexterity and Archetype objects might provide the same marker
  interfaces.
 Add a ICustomMigrator interface to the migration framework, which can be used
  to register custom migrator adapters. This can be useful to add custom
  migrators to more than one or all content types. For example for
  schemaextenders, which are registered on a interface, which is provided by
  several content types.
typo
Register folderish views not for plone.app.contenttypes' IFolder but for
  plone.dexterity's IDexterityContainer. Now, these views can be used on any
  folderish Dexterity content.
rm unused import
+- Do a better check, if LinguaPlone is installed, based on the presence of the
+  LinguaPlone browser layer. Asking the quick installer tool might claim it's
+  installed, where it's not.
rm unecessary title prop
Merge branch 'thet'