indentation correction
added inline element class in application.css and removed it from questions.css
Modified panel class
Question cannot be deleted if it is included in some tests
changed path helper
Test taking functionality made functional, it interacts with the db now
added before_destroy callback, if question is included in some test
dates check at the time of creation only
added association for quiz answers
Modified css
modified show page of the test
modified routes and added new routes for test taking
schema modified
Added test taking part, without timer
changed welcome message, used name in place of email