added create , delete , assign task #144 #146 #200
 added missing model of task_user , documentation cleaning , and changed size of text field #146 #144 #200
 added tests #144 #146 #200
 organised the view #144 #146 #200
 removed photo uploader added edit
 added delete , create , edit and assign task all working with new midifications of reviewer #144 #145 #146 #200
 #144 #145 #146 #200 corrected the documentation and code indentation
 added tasks controller #144
 added current user check
 added assign tests #200
added assign test and corrected the extra end #144 #145 #146 #200
 removed conflicts
 added </br> to make the view better
Merge pull request #307 from yousraHazem/c2_salma_sprint_1

C2 salma sprint 1