Migrate co-op pages from old site

I ran `ruby migrate_coop_pages.rb` in `scripts`. There will need to be
some manual tidying up of the generated `.md` files under `_coops` but
I think this is a good start. As a one-off it doesn't warrant the time
it would take to improve the migration script.

_coops/glowbox-design.md

@@ -0,0 +1,34 @@
+---
+title: Glowbox Design
+name: Glowbox Design
+website: http://www.glowboxdesign.co.uk
+email: contact@glowboxdesign.co.uk
+twitter: 
+github: 
+telephone: 
+address: London
+latitude: 
+longitude: 
+clients:
+- creating-freedom
+- participatory-economics-uk
+- stand-up-for-labour
+services:
+- artwork
+- branding-and-identity
+- development
+- graphic-design
+- illustration
+- logo-design
+- user-research
+- web-design
+technologies:
+- after-effects
+- htmlcss
+- adobe-illustrator
+- indesign
+- javascript
+- photoshop
+- wordpress
+---
+