Move Assignment content type panelizer settings into a submodule

The default panelizer layout should be editable without overriding the ideal_project_content_type feature.
Add entity_view_mode module
Add manual crop and view mode for thumbnails
Display large thumbnails for student works list
Large grid layout for student work list page
move entity view mode info to a new feature

For now entity view modes can only be exported into one feature. See https://drupal.org/node/1425620
Add update task to enable new dependency