Fixes relating to branding, example pods and images.
Remove dead pods. Now 10 pods listed in the order of most monthly users from pods.jasonrobinson.me.
Fix branding - 'diaspora*' is the correct styling.
Add favicon here that used to be pulled from joindiaspora.com
Fix sharing code examples according to comments from Cyprien Pouzenc
Basically moving the javascript from href to onclick avoids a blank page with [object Window] in some cases
Minifying index.html, fixing onclicks on /about