Add NatSpec and Documentation Generation#2

Draft

mr-ubik wants to merge 12 commits intomasterfrom natspec

+4,284-1,636

Commits on Sep 18, 2020

Commits on Sep 20, 2020

Updates
vasapower
committed
Update docs
mr-ubik
committed

Commits on Sep 21, 2020

Typos Fixes
vasapower
committed

Commits on Sep 22, 2020

Update docs with StateHolder
mr-ubik
committed