added unassign task #268
 corrected text field size and text-allign to right #268
 added getProjectmembers
 removed unwanted file
 added unassign and corrected documentation and code #268
 added upload photos #266
added umls #303
adjusted umls #303
 added upload image , unassign tests , #266
 deleted un needed files for trying
added taskUser controller , model, test and solved conflicts #266 #268
adjusting authentication #179
 solved conflicts #266 #268
adjusted authentication #179
 adjusted list and model #179
added back link
adjusting validations #179
adjusted validation #179
adjusting validation #179
Merge pull request #319 from yousraHazem/c2_salma_sprint2_unassign

C2 salma sprint2 unassign