Purge MaxCDN with GitHub deploy

MaxCDN has been fantastic for us (https://commando.io). We suggested this feature... And they delivered.

Purging a zone takes seconds, and they have the ability to add http headers from the CDN side which has been great to add Access-Control-Allow-Origin "*" on JavaScript assets. They also just released SPDY support on SSL zones.

That is a great features. I will implement.