This commit removes the restriction on django management commands.  If a command is unknown to the django installation, there will be a concise error produced.

for example:

  tasks:
    - name: invalid command
      django_manage: virtualenv="/valid/virtualenv" app_path="/valid/app_path" command="nowaydude"

Results in:

failed: [hostname] => {"cmd": "python manage.py nowaydude", "failed": true}
msg: stdout: Unknown command: 'nowaydude'
Type 'manage.py help' for usage.

:stderr: Unknown django command: nowaydude

The django 'migrate' command should receive the --noinput command,
otherwise it can block waiting for user input.

Signed-off-by: Jochen Maes <jochen@sejo-it.be>

  Migrated all examples: in DOCUMENTATION=''' string to standalone EXAMPLES=''' string
  Added deprecation warning to moduledev.rst and remove deprecated example from it
  Fixed up a few typos and uppercased some acronyms.
  add consistency to how EXAMPLES are formatted

Both modules seboolean and zfs have not been adapted since they defer from the default (either by having a 'null' or special state, or prefering "on"/"off" for state indication.

Add some aliases for django manage, mainly around underscores, and use the newer (easier) way to do module docs.  Also
add list of avail commands to docs.