Add ability to inspect the ABI-encoded parameters used for deployment (input data)

[filippsen]

Summary

what about constructor arguments? [...]

Motivation

The parameters are contained in the binary file (.bin file, append to it), but it may not be easy for people to tell where does the base contract code ends and the appended arguments start. It would be good to have the ABI-encoded arguments explicit

An example would be sharing the ABI-encoded parameters with Etherscan for the verification process (Verify and Publish).