Refactor templating to util, move 'Solidity' types to a more proper abi package, improve documentation of permissions snatives and improve argument and return types

Introduce more strongly typed SNatives, templates for generating contract, and test for permissions contract

Cleanup: introduce word256 and remove dependency on tendermint/go-common

Function signatures automated and fix set global

word256: pull tendermint/go-common relating to word256 into eris-db for permissions and eris-mint (TODO)

genesis: re-introduce GenesisTime in GenesisDoc

Issue434: cleanup comments with respect to internal time

tests: add forced cleanup of :build tag

carry over hotfix: correct deployment from master and release

release: push latest from master, version tags from release, immutable version tag for tagged commits

Signed-off-by: RJ Catalano <rj@monax.io>

Signed-off-by: RJ Catalano <rj@monax.io>

Signed-off-by: RJ Catalano <rj@monax.io>

Signed-off-by: RJ Catalano <rj@monax.io>

issue-476: return One256 for EXTCODESIZE on native contracts

Signed-off-by: RJ Catalano <rj@monax.io>

Signed-off-by: RJ Catalano <rj@monax.io>

Signed-off-by: RJ Catalano <rj@monax.io>

Draft changelog

 Begin stabilising v0.16.0 on release-0.16

update JSON-RPC codec to observe specification

rpc: add AssertIsRPCResponse as marker method for restricting implementation of interface to actual RPCResponse types

Update version manager

Add sub_id parameter