New Feature:
- Added a log middleware on server side that will print request body and response body per request (except GET, OPTIONS and HEAD), so that debugging will be easier.
Bug Fix:
- Silent failure on updating exam on the teacher client.
- "action forbidden when any exam is active or its scores aren't calculated" error while there's only one incoming exam(whose score is of course not calculated).
- Now ignore leading and tailing spaces of answers (of bfq, crq and cq) while judging and comparing.