Feature/polygon drawer#4

Draft

joeyrush wants to merge 2 commits intoRunalyze:masterfrom

joeyrush:feature/polygon-drawer

Commits on Mar 27, 2019

Add a polygon feature and a polygon drawer
Joe Rushton
committed

Commits on Mar 30, 2019

Removed redundant code, add docblock, remove dependency on collection class
joeyrush
committed