Fix check command: when multiple contracts have the same ABIs

Multiple contracts might use the same ABIs. Output of abiniser check was incorrect in that case , it has been fixed now

Maintenance commands: check and removeSourceEntries

• new check command: checks integrity of generated ABI and deployment files
• new removeSourceEntries command: removes all source: entries from generated deployment files
• generate command moved to a separate command

Don't include contract source by default

• Added option (-s, --source-include) to include source code in output deployment files.
  Not including by default to reduce file size #2

• updated to commander 2.20.0 #2

encapsulate deployedAbis in deploys file

• abi deployment info is now encapsulated into deployedAbis for easier iteration:

deployedAbis: { 
    <abi version hash>: {
        deployments: { 
            <contract address>: { }
        }
    }
}

regenerate deploy info even when address exists if deploy info changed

regenerate deploy info even when address exists but contract deployment info changed - special case for local chains where address can be the same for different contracts.

minor package.json fix

• updated main: in packages.json to abiniser.js

new deployments output structure

• complete revamp of deployments output structure
• change default output directories: abiniser/abis and abiniser/deployments
• recursively create output subdirs if they don't exists
• added --network-id option

First pass release

first pass basic implementation