Add CSS and rich preview tags to the sources page

[Nightcaat]

The sources page is missing CSS, rich preview tags, and a favicon. This makes the page look bland.

Adding CSS and rich preview tags would make the page fit in better with the other pages on the website.
Additionally, partyblob's width and height should be changed to 30 to match the other blob images on the page.

[Nightcaat]

Added in pull request #34.