Casper The Finality Gadget Paper : Update Slashing Penality

According to latest version of the Casper FFG paper ;

> The penalty for violating a rule is a validator’s entire deposit. This maximal penalty is the defense against violating the protocol.

However, according to a few discussions on https://ethresear.ch/ and some of the talks I attended to, it seems like the partial slashing scheme will be adopted.

Start by reading the latest Casper FFG paper and the discussions on ethresear.ch referenced in the issue to determine whether partial slashing has been adopted. Done means updating the paper's slashing-penalty description to match the agreed protocol design, but no target file or settled decision is identified.

Written by the indexing model from the issue text.