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 C2_Yomn_El-Mistikawy_Implement_an_achievement_system_#217
Finished_number_of_targets_badge_logic #217