bug 787240 - Correct usage of loading.png
bug 787240 - fix links to excanvas.pack.js
bug 787240 - fixed 404s where the url ends in just /os_name/$
bug 787240 - fix link to pending ajax report
bug 787240 - redirecting to legacy topcrasher urls without versions specified
bug 787240 - redirecting to legacy topchangers urls without versions specified
bug 787240 - fixes redirects for home page with product ending in .../versions/$
pep8 fixes
Merge pull request #1367 from peterbe/bug-787240-permanently-redirect-urls-from-old-crash-stats-site

Bug 787240 permanently redirect urls from old crash stats site