Upgrade requests (for https://github.com/kennethreitz/requests/issues/1036).
Upgrade lxml (older version has issues with some poorly formatted pages)
Changed URL structure
Permanently redirected old URLs to the new ones
Added rule for base catalog URL
Added initial sitemap infastructure
Implemented sitemap for static pages, subjects, and courses.
Added a south migration to set the site URL
Merge pull request #30 from ChrisCooper/enhancement/url_structure

Consider changing catalog URL structure to be more logical
Merge pull request #45 from ChrisCooper/enhancement/sitemap

Generate Sitemap
Merge branch 'develop' into scraper