Goodie CSS Changes.

This pull request makes the change from the old style of "per-Goodie CSS slurp and append" to the automatic inclusion style employed by Spice.

As part of this process:
- All `.css` files are renamed in the style of `share/goodie/ia_name/ia_name.css`
- All in-code CSS appenders are removed.
- Static in-line styles are moved to separate files.
- Leaving only per-request dynamic styling in the Goodies code.

Prior to this pull request, the following pieces have been updated to sync with these changes:
- The supporting back-end DDG IA code
- The duckpan application and open source DDG module
- The DuckDuckHack documentation on Goodies CSS

This branch appears in the main `duckduckgo/zeroclickinfo-goodies` repository to help expedite the review and facilitate collaboration on any changes.
Hmm, it's pretty important in this; I probably would check all of them personally, but it's a judgement call really