Merge pull request #238 from yousraHazem/development

Merge sprint 1 work into master
removing nickname and permission_id from RegisteredUsers
renaming column in notifications
renaming tags to tag in keywords
creating offensive_words #324
creating posts #328
creating comments #329
creating table puzzle score
creating puzzle table
creating interests,hobbies, and favourites tables #292 #293 #294
creating content provider table #333
#337 adding image attribute to events
#339 Change column name from category to topic in activites
#347 adding column screenshot to videos
#348 #349 creating drag and drop & drag and drop scores
#350 creating audio files
Merge remote-tracking branch 'origin' into C4_S33_content_provider_sign_in
merging migrations #306
Merge branch 'migrations' of https://github.com/yousraHazem/Topsoft-14 into C4_S33_content_provider_sign_in
Adding show action and filtering #306