* Add ssz marshal and unmarshal for most data structures
* Merge refs/heads/master into ssz-stuff
* Merge refs/heads/master into ssz-stuff
* Merge refs/heads/master into ssz-stuff
* Merge refs/heads/master into ssz-stuff
* Merge refs/heads/master into ssz-stuff
* Merge refs/heads/master into ssz-stuff
* Update ferran SSZ
* Update ferran's SSZ
* Merge refs/heads/master into ssz-stuff
* fix tests
* Merge branch 'ssz-stuff' of github.com:prysmaticlabs/prysm into ssz-stuff
* gaz