Fixed #20256 -- Corrected startproject --template help text

Thanks n0nam3 for the patch.
Fixed test failures on MySQL.

Some tests failed when the time zone definitions were loaded in MySQL
and pytz wasn't installed. This setup isn't supported.
Fixed #20025 -- Pointed to a MySQLdb fork for Python 3.

Made a few minor compatibility adjustments.
[py3] Stopped iterating on exceptions. Refs #20025.
Marked tests of BinaryFields as expected failures on MySQL and Python 3.

Current ports of MySQLdb are very buggy in this area.
Merge branch 'master' into ticket-17365-new

* master:
  Marked tests of BinaryFields as expected failures on MySQL and Python 3.
  [py3] Stopped iterating on exceptions. Refs #20025.
  Fixed #20025 -- Pointed to a MySQLdb fork for Python 3.
  Fixed test failures on MySQL.
  Fixed #20256 -- Corrected startproject --template help text