Incomplete user validations.
Remove unnecessary warnings in Rspec. (Steven Approved)
Add user validation and rspec test for name.
Add user model validation for email.
Add user model validation for password with rspec test.
Add question model validation for image path.
Add #create_slug and #before_save :create_slug.
Add rspec test for question#slug.
Add content validation to response model.
Add body validation to comment model.
Fix merge conflicts
Merge branch 'pc3sq-validations'