1426 Cleanup old Highway and rewards references

[ipopescu]

What does this PR fix/introduce?

After introducing Zug and the new rewards scheme, we need to review and update other pages in the documentation. This PR builds on #1429, so it pulls files from that PR.

To make it clear, these are the files that need to be reviewed in this PR:

• source/docs/casper/concepts/about.md
• source/docs/casper/concepts/design/casper-design.md
• source/docs/casper/concepts/design/networking-protocol.md
• source/docs/casper/concepts/economics/consensus.md
• source/docs/casper/concepts/economics/index.md
• source/docs/casper/concepts/economics/runtime.md
• source/docs/casper/concepts/economics/staking/concepts.md
• source/docs/casper/concepts/economics/staking/delegation.md
• source/docs/casper/concepts/economics/staking/staking.md
• source/docs/casper/concepts/glossary/B.md
• source/docs/casper/concepts/glossary/C.md
• source/docs/casper/concepts/glossary/E.md
• source/docs/casper/concepts/glossary/P.md
• source/docs/casper/concepts/glossary/V.md
• source/docs/casper/concepts/glossary/Z.md
• source/docs/casper/concepts/intro-to-dapps.md
• source/docs/casper/operators/setup-network/chain-spec.md

Closes #1426.

Checklist

• Docs are successfully building - yarn install && yarn run build.
• My changes follow the Casper docs style guidelines.

[AlexanderLimonov]

Some relatively small changes are needed I think, but there's also further work on other aspects of 2.0 economics that might need to go in a separate PR

[ipopescu]

@AlexanderLimonov I have addressed all the comments, with the exception of these 3, where I am still following up:

• r1569509946
• r1569536010
• r1569537495

New content explaining incentives, gas, and fees should be added or linked using a new PR -- unless it can be done quickly at a summary level.

[ipopescu]

Resolved 2/3 of the open comments:

• r1569509946 => new commit 8ca79be
• r1569536010 => OK as it was
• r1569537495 => added details from Joe in the comment.

[ACStone-MTS]

LGTM!