implement autocreation of the edit-view for a model
create edit view api generator
create obj class api generator
create locale api generator generator

+ make icon accessible on model generator
create thumbnail api generator
remove title prefixes
update changelog
move api generator into common directory and adopt namespaces
base attributes module is only used once
Merge branch 'develop' into feature/page_edit_view

* develop:
  bump version to 3.1.1
  no message
  bugfix: image obj class creation failed on newly created projects

Conflicts:
	CHANGELOG.md
	lib/generators/cms/kickstart/kickstart_generator.rb
	tmp/test_app/config/locales/en.obj_classes.yml
remove unused kickstarter base options
Merge branch 'feature/page_edit_view' into develop

* feature/page_edit_view:
  remove unused kickstarter base options
  base attributes module is only used once
  move api generator into common directory and adopt namespaces
  update changelog
  remove title prefixes
  create thumbnail api generator
  create locale api generator generator
  create obj class api generator
  create edit view api generator
  implement autocreation of the edit-view for a model