Update authoritative copy.

Update README.md

Added signal tests for ipn.

Not so keen on the whole L thing anymore. Proper case for 'format' model attribute.

Add a test for setExpressCheckout. Change PPP errors to a dict. Update item_check_callback documentation.

Add subscription related standard payment fields. Thanks Maciej Pasternacki.

Small fix for issue #6.

Added a modify variable for the Paypal Standard payments form which allows for modification of existing Paypal subscriptions.

Merge mthornhill's south migrations.

Formatting. Mark todo with @@@ instead of ###

Clearer flag condition.

Fix a bug with non-ascii payment data.

Updated the README with some common FAQ.

Merge commit 'origin/master'

Passing all IPN & PDT tests.