Iusses #304 & #289 and adding type to paramter constarints
Issue #304 & #289 adding lecturer to acknolegment
uncompleted to incomplete
#319 Adding composite key : title & track_id
fixing extra line
Merge pull request #305 from alaashafaee/dev_database

Iusses #304 & #289 and adding type to paramter constarints