Update to latest susbtrate and contracts pallet (#31)

* Update substrate to Alex's WIP framev2 PR branch

* Pin funty

* WIP updating Config trait and parameter types

* cargo update

* Use substrate master now contracts PR merged

* Copied constants from node-runtime

* Fix runtime compilation

* Use latest substrate wasm builder

* Fix up node

* Add key subcommand

* Increment spec version

* Remove master branch specifier

* Remove funty pin from manifest, it should be in the `Cargo.lock`

* Use contracts parameters copied from node-runtime

* Update README substrate commit