Updated blog, added "Extending the Default User Model" post

Signed-off-by: coreymcmahon <contact@coreymcmahon.com>
Merge pull request #7 from coreymcmahon/modify-users

Updated blog, added "Extending the Default User Model" post
Updated blog, fixed minor errors on 'Simple Website (Part 8)'

Signed-off-by: coreymcmahon <contact@coreymcmahon.com>
Merge pull request #8 from coreymcmahon/modify-users

Updated blog, fixed minor errors on 'Simple Website (Part 8)'