refactor(@embark/embark-deploy-tracker): Add back contract tracking

Add back contract tracking to the refactored code. Deployment checks are added as plugins to the `embark-deployment` module.

Adds ability to track if a contract has already been deployed, and skips deployment if so.

Updates error handling flow for deployment process.

Adds a contract class to the `embark-contracts-manager`, to add a `log` function for the contract. This `log` function can be called from any module that has the contract instance.

Adds TS interfaces for contracts configuration.

Handles the following cases:
1. Contract already deployed
2. Contract not deployed
3. Contract is configured with `{track: false}` (deploy if not deployed, and don't track)
5. Contract is configured with an `address` in the config
6. `trackContracts` set to `false` from `engine` (always deploy but don't track contracts). Currently used for the tests.
7. Contract deployment produces an error
8. Interface deployment shows warning.

PR with unit tests and documenation to follow.

# Conflicts:
#	packages/embark/src/lib/modules/ethereum-blockchain-client/index.js

packages/embark-deploy-tracker/src/trackingFunctions.js

@@ -58,6 +58,7 @@ export default class TrackingFunctions {
   }
 
   setCurrentChain(_params, callback) {
+    if (!this.chainFile) return callback();
     if (this.chainFile === false) return callback();
     if (this.chainConfig === false) {
       this.currentChain = {contracts: []};