Added RSS support, some style fixes

Basic support, as I do not have any experience writing RSS feeds, but the Django docs made it look easy. If I am missing anything, please fill me in!

This should close #52, and the RSS that is generated by Django passes the W3C checker, but I can not access the admin page, so I can not really test it.

I think I should add a link to it somewhere on the /blog/ page, so I would like some feedback as to where it should go. In fact, feedback for all of it would be cool. :v: 

The style fixes were mostly so PyCharm would stop highlighting it and yelling at me for pep8 reasons

[Not ~~tested or~~ completed so not ready for merge]