Add back monitor tutorials#156

Draft

dixia wants to merge 7 commits intodevelopfrom

add-monitor-tutorial

Commits on Feb 11, 2020

Commits on Feb 19, 2020

remove old syntax
dixia
committed

Commits on Feb 20, 2020

Editorial and peer review
bobgt
authored

Commits on Feb 25, 2020

Merge pull request #154 from EOSIO/bobgt-patch-1
dixia
authored

Commits on Mar 2, 2020