Simplify product url tag

Consistently use product.get_absolute_url for product url, instead of 'category:detail' with kwargs
Fix for oscar_calculate_scores

Use double quotes(") instead of grave accents (`) to avoid DatabaseError while running 'python manage.py oscar_calculate_scores'
Add 'Processed' as a final status in order status pipeline

Without this, it's not possible to search for processed orders from the dashboard, since the 'Processed' status doesn't come up as an option in the status select box.
Update select2 to version 3.4.5
Fix typo

ProductReview model has property review*er*_name
Fix some typos in the documentation
Remove typos

Fixes #1021
Fix typo and formatting

Fixes #1028
Create a new stacking context for the freakishly large z-index values used in upload-images

Without this, the image form is drawn over a datetimepicker that pops up so
that it overlaps the image form.
Added template blocks for easier customization
Minor PBD fixes

* Demo site now included link to dashboard when user has
  dashboard_access permission
* Correct permissions are set for new AJAX product lookup view
Use {% static %} for all images

Missed two instances.
Merge pull request #1031 from mbertheau/dashboard-users-template-blocks

Added template blocks for easier customization
Merge pull request #1023 from nitishr/patch-4

Add 'Processed' as a final status in order status pipeline
Merge pull request #1016 from nitishr/patch-1

Consistently use product.get_absolute_url
Merge pull request #1018 from itbabu/fix-oscar_calculate_scores

Fix for oscar_calculate_scores command
Use correct var for displaying transactions in dashboard order detail
PBD: Enforce one stock record matching users partners
Pass user into StockRecordForm

This would be necessary if one wishes to limit the partner selection
available in the product dashboard. As that might be a common
requirement, we just pass it along.
Pre-select partner if appropriate

If the user is not a staff user and has only one partner associated, we
pre-select that.