switch to can-connect-feathers

[frank-dspeed]

This example needs to switch to can-connect-feathers to use the new nativ feathersClient v3+ and it will change transport protocol soon so to keep track this demo should always use the client so this is abstracted.

can-connect-feathers will support with the next update dynamic loading of the feathersClient as promise based on condition to enable ssr with realtime again canjs/can-connect-feathers#104

[justinbmeyer]

While can-connect-feathers is great, using feathers client is beyond what we want to show in one of the initial guides for DoneJS. DoneJS is intended to be not only node-framework acentric, but also backend language acentric.