https://github.com/imeji-community/imeji/issues/557
https://github.com/imeji-community/imeji/issues/558
https://github.com/imeji-community/imeji/issues/481
https://github.com/imeji-community/imeji/issues/587
Authorization: new implementation first version
Authorization: Remove old Grants
Authorization: debugging
Authorization: remove case with grant null
Authorization: fix some issues in xhtml pages
Execute all http method with ProxHelper
https://github.com/imeji-community/imeji/issues/611
fixed typo in class name
https://github.com/imeji-community/imeji/issues/625
https://github.com/imeji-community/imeji/issues/625
https://github.com/imeji-community/imeji/issues/625
https://github.com/imeji-community/imeji/issues/627
https://github.com/imeji-community/imeji/issues/627
User groups implemented
https://github.com/imeji-community/imeji/issues/529
Improve performance of metadatatree