* Now supports alternate import statements:
* import {Token} from 'Embark/contracts';
* import * as Contracts from 'Embark/contracts';
as well as the existing syntax:
* import Token from 'Embark/contracts/Token';
* Contracts js files moved from .embark to .embark/contracts
* .embark/contracts/index.js generated on the fly which requires all contracts in .embark/contract automatically and then creates a module.exports with each of them.