Update the way host feedback works

Created by: ChrisSchinnerl

This PR is meant to improve existing measurements and add new ones like latency, speed and responsiveness to requests.

The first step is to add "InteractionReliability" by counting all the successful and failed interactions with a host (upload, download, delete, modify, form new contract, renew contract and scan) and adding them up to historic values which decay at a certain rate after each new block.