Removing .idea folder from git
Updated db/schema
Validation for instructor to be don't have overlapping events when creating new event in account.
Move twitter secrets to config
Update validation message for unavailable instructor
Instructor can edit his courses he wants to teach. Fix validation issue when removing instructor's language that has already been assigned to the event
Add events list into validation error when deleting instructors language assigned to event
Change users language selection to chosen style.
Optimize my_upcomming_events with includes courses
Change SQL DISTINCT to Rails .uniq in users method: instructor_events
Show full location in event's list for shown course
Add certificate controller and show-view for each certificate. Add list of certificates for shown course
Hide cancel account
Fix event validation when user removes language in account