Merge pull request #78 from dr40/dev

Manange category and user
IVVQ-Group5-Musements-74 Manage Category
Merge pull request #83 from dr40/ok/74/Manage_Category

Ok/74/manage category
#69-Manage Notification
Merge pull request #85 from dr40/ha/69/Manage_Notification

#69-Manage Notification
#69-Manage Notification
Merge pull request #87 from dr40/ha/69/Manage_Notification

#69-Manage Notification
Merge pull request #88 from dr40/dev

Get notifications views