Major refactoring, allow multiple environments

* Allow multiple environments to coexist
* Change the way config works (yml file with per env config)
New design using bootstrap
Upgrade Pusher gem version
Clean up JS and add more debug messages
Move CDN configuration to config.yml
Improve colours
Extract and clean up JS from public.erb
Clean up ERB templates and CSS
Add checkboxes to allow disabling transports
Allow enabling transports via query params
Minor cleanup
Make page title and header consistent
Allow filtering log messages
Pass all query parameters to links
Merge branch 'master' into new-design

Conflicts:
	app.rb
Fix binding transport checkboxes
Merge branch 'new-design'