Performance fix for round beacon pt2

#481

Performance fix for round beacon

• #480

Fix grafted ownership bug

• #475

Tupelo SDK

• Combine repositories for Tupelo signer and SDK to make development and iteration easier
• Track network metrics
• Create human-readable named ChainTrees

Bugfix for docker image

• Bugfix for docker image #458

Batch transaction validation into rounds

Batch transaction validation into rounds, and use a Snowball-based consensus algorithm to agree on each round.

Version bump

triggered by https://github.com/quorumcontrol/tupelo-go-sdk/releases/tag/v0.5.11

Version bump

triggered by https://github.com/quorumcontrol/tupelo-go-sdk/releases/tag/v0.5.10

v0.5.0 release

v0.5.0 contains a number of improvements and general upkeeps:

• support go 1.1.3
• add toml config support
• move from custom datastore interface to ipfs/go-datastore
• switch to gogoprotobufs from golang/protobuf

Full protobuf messages

• removes msgp in favor protobuf
• adds configuration for notary groups
• fixes panic on bad tip requests
• fixes shell encoding for resolve-data