Freeze go import dependencies

[NSkelsey]

To prevent breaking API changes by freezing all of the dependencies we need at specific versions.

This can be done by forking all of the libraries that do not use hard versioning like go-qml.

The list is thus (but these may have further dependencies which need to be unraveled:

    github.com/btcsuite/btcd -> github.com/soapboxfork/btcd
    github.com/btcsuite/btcrpcclient -> github.com/soapboxfork/btcrpcclient
    github.com/btcsuite/btcutil -> github.com/soapboxfork/btcutil
    github.com/btcsuite/go-flags -> github.com/soapboxfork/go-flags
    github.com/btcsuite/websocket -> github.com/soapboxfork/websocket

    github.com/microcosm-cc/bluemonday -> github.com/soapboxfork/bluemonday
    github.com/russross/blackfriday -> github.com/soapboxfork/blackfriday

[NSkelsey]

I will be using godep to do this.