[WIP] Async Deployer

[cgewecke]

• Refactors deployer into a module that can be consumed by a Reporter which runs arbitrary async code on emitted events before returning control flow. (See reporter in tests for basic example). Used this library for that.
• Adds logic to idle deployments for n confirmations, via truffle config. truffle 763
• Implements (as a part of the unit tests reporter) +/- exhaustive parsing of the error messages we get back from the vm / web3. Have also mocked in some logic for reason string handling - needs a release at ganache-cli and little extra logic to be complete.
• Needs checking against geth to make sure error mgmt. is cross-client. Parity?
• Table below would be better if it had the JS payload for each of event but it's kind of a formatting nightmare. TLDR; reporter gets tons of info. Needs documentation.
• Parallel work at truffle-migrate is beginning now.

Requesting preliminary review so architectural stuff can be addressed as necessary.

ERROR COHERENCE CHART

Error	Cause	V4	V5
Insufficient funds	Sender balance < cost	Yes	Yes
Out of gas (block limit)	ex: while looping	Yes	Yes
Base fee (block limit)	ex: contract undeployably large	Yes	Yes
Base fee (gas too low)	ex: {gas: 100}	No	Yes
Check your gas amount	Contract is interface/abstract	No	Yes
Nonce too low	Infura load balancing	No	Yes
Check your gas amount (revert)	Failing require condition	No	Yes
Check your gas amount (invalid opcode)	Failing assert condition	No	Yes
Exceeds block limit	Sent gas > block.gasLimit	Yes	Yes

EVENTS

Event	When	Async
preDeploy	After trial gas estimate is executed, immediately before deployment is attempted.	Yes
postDeploy	On successful deployment.	Yes
preDeployMany	Immediately before a batch of deployments is attempted.	Yes
postDeployMany	On successful deployment of a contract batch.	Yes
deployFailed	On deployment error.	Yes
linking	On linking of contracts to libraries.	No
error	On all non-deployment errors	Yes
transactionHash	On receiving a deployment's web3 transactionHash event.	No
receipt	On receiving a deployment's web3 receipt event.	No
confirmation	On receiving a deployment's web3 confirmation event.	No

[cgewecke]

This needs to be 'truffle-contract'

[cgewecke]

ppp

[cgewecke]

Handle this.