example with delegatecall

[lazovicff]

This is an implementation of forwarder (proxy) contract described by Vitalik in this post: https://www.reddit.com/r/ethereum/comments/6c1jui/delegatecall_forwarders_how_to_save_5098_on

Gas costs for 3 deployments:

• 1075584 - proxy approach
• 1300359 - normal approach