update the encrypt (save) and decrypt functions to be python3/dnspython friendly
using bytestrings instead of expecting strings.

statistic_port is now control_port.

removed the validations from admin.py because the model fields now provide
for validators of their data.

add creds dir to the settings.py

break up each test into its own function to make debugging the test failures easier.

fix forms where the widget was being specified but overriden in the view. remove the specification of the widget

also mention which django db args are required vs optional

updated README to focus on developing/running via docker

Note to self: always test in a container running a recent version of django. i was still testing on 1.7 :/

eventually this will make lead to making it a bit more docker/kubernetes friendly

tested running by submitting to 3-machine coreos etcd cluster

Adds support for Django 1.9 while dropping support for unsupported versions.

Attempted to clarify install documentation

This commit adds support for Django 1.9. As the template configuration options
changed with Django 1.8 and versions earlier than 1.8 aren't supported anymore
anyway by upstream, support for them is removed.

To have the Dockerfile still working, this commit also changes its logic so the
dependencies get directly installed via the requirements.txt from PyPI, which
will ensure that always matching versions of all dependencies are present (e.g.
the Django version).

I've just worked my way through the install process and tried to
clarify/explain anything that wasn't obvious or that I thought might not be
obvious to someone new trying to use this software.

Having encountered all the same problems as @vchoi in issue #5 I've attempted
to update the documentation to clarify the requirements.

Other than that its 'misc' really: some confusion with things like
local_settings.py being missing, changed the headings and shuffled things
around for clarity, expanded on the required django commands etc.