Proper username resolution

This re r'^(?P<username>[.+-@\w]+)/$' resolve username as the whole last part of URL.
Mean this:

If URL is "/blog/authors/someusername/page/23/" than username is "someusername/page/23/"

Placing paginated view URL before UNpaginated will fix the problem.
Merge pull request #207 from gvidon/patch-1

Proper author username resolution