RPC test for BlockchainInfo

Might be running the integration test wrapper when we didn't intend to and multiple times

Make sure command-line arguments expanded correctly

Fix blocking event subscription in transactAndHold (develop)

Issue260 delegatecall on develop

Remove deprecated -f docker flag

significantly reduce build time of Dockerfile

Separate integration tests from unit tests by tag, and fix remaining RPC tests

version: correct develop to v0.12.0-rc3

Use a random subscription id as rpc/v0 does on rpc/tendermint

testing: hard-cut on making the CI green

Fix mapAndValues and even write some, like, test

Dry up client

[Merge last] Fix NameReg test

Tweak BlockchainInfo to use stuff we have actually initialised

Don't special case empty blocks when refreshing the checkCache on commit