and browse) to a Class Based View, using
the ListView class as a base.
Also adds in the permission checks in the
submission process, both in the
PrefillUsingIdentifier as in the
SubmissionCreateView. This should prevent
any unauthorized submissions.

Also fix missing template error for modified thesis links.

Edit styles to make old comment form better readable.
 This commit includes a new template which should eventualy act
 as a replacement for crispyforms which do not allow for
 easy bootstrap implementation.

The Comment model now has a option to
 append a file (pdf, png, jpg) to itself.

CAUTION! READ ME!
This migration will setup a proper attachment environment.
This means, that for existing files (journal publication!),
 these folders/files should be completely moved to the MEDIA_ROOT
 folder, else this will return a 404 NotFound for the related
 files.

Improve comments app to follow PEP rules
 and remove all wildcard imports!!