Fixes #495

- Added stubs for both apps
- Switched to using :automodule: for abstract models instead of
  individual :autoclass:
- Added instructions on creating a Partner and ProductClass instance
  when setting up a new Oscar instance

Building the sandbox was explained in multiple locations, and in
slightly different ways. The sandbox now has a separate document.

Yet another project is hard to maintain, and it's mainly used for
internal use. Removing it reduces the number of options of how to get a
Oscar project running, hence making it easier.

To set a base for upcoming docs changes, the docs directory structure
has been streamlined to follow a simplified version of Django's docs.

The old _draft folder has been removed. Both files from there and the
current docs that don't fit nicely into the new structure are in _old/
for the moment.

Replaced legacy 'shop' name with 'application'

* Use `code-block` to see if that renders differently

See https://groups.google.com/forum/#!topic/django-oscar/-F1rEUX-RZA

To avoid confusion.

Fixes #429

Fixes #310

Update makefile and docs to reflect this change.

Fix requirements_oscar.{py,txt} file extension in tutorial.

This makes it much easier to get started when contributing.  The docs
are also updated.

This makes it much easier to get started when contributing.  The docs
are also updated.

This avoids conflicts with other libraries that use the same trick for
extending templates.