Update Django project files' style to 1.4

Change-Id: If8a4313ee059b7fdd87cb5bb7438fffc59b9af1d
Make manage.py executable

Change-Id: Ia816961109ea7138be5c9918c24ed4f5544d3aeb
Add OpenID logo in blog post_detail template

Change-Id: Ia3cc123b0c47dd3505320f99a16746da7824d256