introduced categories
categories can be assigned to packages
removed the admin-flags from metainfo schema in favour of categories
fixed typo
including javascript :-(
base controller provides category links
added inverse relation to category
extracted search controller
fixed navbar in admin homepage
showing uncategorized packages in admin index view
Merge branch 'feature/categories' into develop
fixed some tests
#4 introduc symbol extension, separated from icon extension
#4 registered symbols extension
metainfo factory uses the packagist scanner to create metainfos (removed duplicate code)
dropped the symbols extension
refactored the metainfos extension, display style is now hardcoded, but much less complicated
admin controller triggers update (fixed, using jobqueue)
fixed a packagist scanner bug
fixed a possible bug in packagist scanner