Docs update with new fnctl commands (#273)

* Added high level roadmap.

* Changed to funtion.yaml.

* Added logo

* updating quickstart code example, WIP, waiting on another merge.

* Minor updates.

* Changed function.yaml to func.yaml and updated fnctl README.

api/ifaces/app.go

@@ -9,7 +9,6 @@ type App interface {
 }
 
 type Route interface {
-	// AppName() string      `json:"appname"`
 	Path() string
 	Image() string
 	Headers() http.Header