Sponsors page layout

[katzien]

Create in sculpin.

[katzien]

Data added in #19

[opdavies]

A couple of questions:

• Are we going to continue linking to the sponsor logos directly on Meetup? These seem quite small and low quality, at least the ones we have now.
• Are we going to add a short piece of text below each sponsor as we have currently on http://phpsw.uk/sponsors?

@leesto @DaveLiddament @katzien

[leesto]

I think we should get some better quality / larger images. Can dump them into this repo or we can host them form the imgcdn I set up on S3.

It would be a nice bonus to have the explanatory text IMO.

[DaveLiddament]

I'll add an optional description field to sponsors so we can add extra information.