Added and removed columns from entities #233
Merge pull request #257 from Saftophobia/C4_omar_elmenawy_signup_#233

Added and removed columns from entities #233
Changes in the migration file done, types of  columns and column names changed #237
Merge pull request #258 from Saftophobia/C4_Sarah_Fathallah_Messages_Migration_Files_#237

Changes according to the final user story code
Merge branch 'master' into c1_nardeen_post_in_group_#142