Fixed problem in templates
WorldPay xml callback
Added integration test and implementation of WorldPay xml callbacks
Added initial excel suppport preserving macros
Added callback url for Worldpay
Refactored cdr processing in order to generate Orders just after rating
Removed / in url
Added some __unicode__ methods to print data properly at admin interface
Changed static content url
Serving S3 static files using http instead of https
Skipping auth header for S3-backed static content
Enhanced UX by defining a simple screen flow
Making successfull redirect invoke callback logic. This is only for demo purposes
Improved usability when redirecting from payment gateway
Fixed some basic UX minor issues
Creating revenue report excel
Tests for sending collections report
Added collections task module to celery
Removed keep_vba param in order to simplify deployment in heroku
Changed content-type for sending excel files