Refactor spf.nav to create an object for handling request data.
Refactor spf.nav to create an object for handling request data.

Progress on #285.

youtube/spfjs,nicksay/spfjs,theanh/spfjs,tchiotludo/spfjs,nicksay/spfjs,theanh/spfjs,youtube/spfjs,theanh/spfjs,nicksay/spfjs,youtube/spfjs,scrapp-uk/spfjs,youtube/spfjs,tchiotludo/spfjs,nicksay/spfjs,scrapp-uk/spfjs,scrapp-uk/spfjs,theanh/spfjs,nicksay/spfjs,scrapp-uk/spfjs,tchiotludo/spfjs,youtube/spfjs,scrapp-uk/spfjs,theanh/spfjs,tchiotludo/spfjs,tchiotludo/spfjs