• Update www/py-django-mezzanine to 4.2.3-148

Changes to the port:
*Changed CHEESESHOP to GH. Reason: Release 4.2.3 is dated from Q1/2017 and

has no support for Django 1.11 or newer. Support for Django 1.11 has been
introduced with commit 564e574 . When upstream brings a new release then
a return to CHEESESHOP should be no problem.

*Changed RUN_DEPENDS to reflect the new dependencies
*Added NO_ARCH
*Added pkg-message with quick start notes to improve the user experience
*Added SUB_FILES and SUB_LIST for pkg-message

• Update www/py-django-mezzanine-filebrowser to 0.4.7
• Update www/py-django-mezzanine-grapelli to 0.4.7

PR: 228417
Submitted by: freebsd_ports@k-worx.org
Approved by: koobs (maintainer)
Sponsored by: iXsystems Inc.