#267 improved docu for breadcrumbs: documented meaning of breadcrumbId and where to define according breadcrumbs in app.js
#282 Display object names consequently without human readable
Only names for scenario and usecase is displayed as human readable (everywhere!).
Also not displaying object types as human readable.
Changed this in tree, on object overview page and in breadcrumbs.
(is now consistent with how it is displayed in metadata)
Merge branch '64-browsing-app-specific-objects' of https://github.com/scenarioo/scenarioo into 64-browsing-app-specific-objects

Conflicts:
	scenarioo-client/app/views/usecase.html
#284 no img tag will be shown, as long as no child exists
Merge branch 'develop' into 64-browsing-app-specific-objects

Conflicts:
	scenarioo-client/app/views/usecase.html
Merge branch 'develop' into 64-browsing-app-specific-objects

Conflicts:
	scenarioo-client/app/scripts/services/breadcrumbsService.js
Merge branch 'develop' into 64-browsing-app-specific-objects