updating hadoop Q a bit
showing explanation below answer
schema update for interview q
adding quiz answer + explanatino
adding simple_format for explanation
 adding exact answer as an option for interview questions
changing autogradable answer flash
disabling sanitize for simple_format
adding the first set of solutions
adding exact answer form
adding migration for adding explanation to interview Q
Adding answer to the last bit of interview questions.
typo
small gramma
QA-ing answers
merge + letting users know that there are no more questions
Merge pull request #1205 from teamleada/tristan_add_free_response_quiz_answers

Tristan add free response quiz answers