Added new field for User - a name. 

* Added new field for user - a name. 
* Refactored registering so the user has to input the name (beginning with a capital letter). 
* Moved the initials of the author to user. Also added a method called author to Question so we don't have to change all the views which display author (I'm displaying user.name as author now). 
* Edited forms so the Author cannot be input now. And most of all refactored tests (added test for User which now checks most of validations on author which was tested in Question before).
Thank you for all this work, Im impressed! :D
I would like to ask, should I make a new branch now and recreate this code using your advices (so there are no unnecessary commits) and open new PR again, or should I make changes to my master branch for this?