Add doc8 check

Author: adamtheturtle

Makefile

@@ -3,6 +3,7 @@ SHELL := /bin/bash -euxo pipefail
 .PHONY: lint
 lint:
 	check-manifest .
+	doc8 .
 	dodgy
 	flake8 .
 	isort --recursive --check-only

dev-requirements.txt

@@ -4,6 +4,7 @@ VWS-Python-Mock==2018.10.02.0
 autoflake==1.2
 check-manifest==0.37
 codecov==2.0.15 # Upload coverage data
+doc8==0.8.0
 dodgy==0.1.9  # Look for uploaded secrets
 flake8-commas==2.0.0  # Require silicon valley commas
 flake8-quotes==1.0.0  # Require single quotes