Update URI of Wymeditor example page

The existing URI, http://files.wymeditor.org/wymeditor/examples/, returns a 404 error. There are two possible sets of examples to view based on desired Wymeditor version:

1. 0.5 -- http://files.wymeditor.org/wymeditor-0.5/examples/
2. 1.0.0b2 -- http://files.wymeditor.org/wymeditor-1.0.0b2/examples/

I'm not entirely certain which version most closely matches that used by Django CMS so I've linked to the examples for version 0.5.