* update docs
- make install_c cmd (install)
- explain node IDs (quick-start)
- update UPGRADING section (using-tendermint)
* use git clone with JS example
JS devs may not have Go installed and we should not force them to.
* rewrite sentence
* docs: link consensus to blockchain spec. closes#2422
* docs: deprecate research section. closes#2401
* docs: fix some links
* docs: fix some markdown lists
* docs: fix more links
Refs #1861
We don't use the fee field and its likely just confusing.
We can add backwards compatible priority (instead of fee) later.
Note priority is better than fee because it lets the app do the math on how to rank order transactions, rather than forcing that into tendermint (ie. if we return fee, priority would be fee/gas)
