fix some more documentation

minor documentation fix

Test it's imposible to subscribe with a banned address

Merge branch 'master' into 'master' ...

Added notes about installing src modules when setting up development environment

When running through the setup as a beginner, I ran into an error because the packages that were pulled down from PyPI did not have all the features/implementations that were needed for a local build. I was told that its a common practice to use the modules from source when developing locally, so I wanted to add a note about using source modules so others may try this before filing potential bug reports. I added example usages as well of how to install from source as well.

See merge request !155

Merge branch 'bump-version' into 'master' ...

Bump version in setup.py

Fixes #134 

See merge request !157

Added note about using source repos for local development to setup.rst

Bump version in setup.py

Avoid a very expensive API request

Merge branch 'fix-example-project' into 'master' ...

Fix example project

* the requirements needed an update so the git version of mailmanclient is used.
* the "home page" url didn't work due to a wrong import

See merge request !150

Update readme

Fix urls for example project

Update requirements for example project

Make the example settings closer to the old standalone settings

Use a specific settings files for testing

Add missing include in MANIFEST.in

Fix Flake8 errors

Merge branch 'create-demo-project' into 'master' ...

Add demo project to postorius

Most of the django project I know keep a demo project inside the repository of the application.
I included a readme with instructions on how to run postorius. This essentially replaces postorius_standalone. 

See merge request !105

Fix more tox errors

Fix record mode

Restore mailman.cfg

Update manifest

Update gitignore and requirements

Update example_project to not log by default

Update urls

Use example project to run tests

Update example project settings

Update docs

Rename example project

Merge branch 'link-existing-address'

Use absorb_existing when adding an address ...

...and fix the response page.