Improve nogo documentation (#1779)
Improve nogo documentation (#1779)

Create a "Setup" section similar to the core rules_go README
that gives direct instructions on how to get run nogo. Also,
make miscellaneous improvements to other section of nogo.rst.

Related #1777

bazelbuild/rules_go,bazelbuild/rules_go,bazelbuild/rules_go,Xjs/rules_go,bazelbuild/rules_go,Xjs/rules_go,Xjs/rules_go,bazelbuild/rules_go,Xjs/rules_go,Xjs/rules_go