Show Colin Caine as a maintainer (JuliaLang#227)

I've committed some stuff now, so let's be less shy.

config/maintainers.json

@@ -24,12 +24,12 @@
     {
       "github_username": "cmcaine",
       "alumnus": false,
-      "show_on_website": false,
+      "show_on_website": true,
       "name": "Colin Caine",
       "link_text": "My Github",
       "link_url": "https://github.com/cmcaine/",
-      "avatar_url": null,
-      "bio": ""
+      "avatar_url": "https://avatars3.githubusercontent.com/u/6000761",
+      "bio": "I write code for scientific papers (computer science and social science) and commercial projects in Julia. It's my favourite language and I'm happy to help a few more people learn it!"
     }
   ]
 }