Fixes for flake8 and rtd

docs/rtd_requirements.txt

@@ -1,3 +1,5 @@
+--allow-all-external
+--allow-unverified PIL
 twisted
 pyopenssl
 sphinxcontrib-napoleon

tox.ini

@@ -6,6 +6,7 @@
 [flake8]
 max-line-length = 120
 builtins = _,__request__
+ignore = E133
 exclude = .tox,.git,dist,build
 
 [tox]
@@ -92,7 +93,7 @@ whitelist_externals =
 deps =
     {[testenv:flake8]deps}
     mccabe
-commands = flake8 --max-complexity --exit-zero 15 deluge
+commands = flake8 --exit-zero --max-complexity 15 deluge
 
 # We do not have all dependencies on RTD and travis so we exclude the
 # site packages (sitepackages=False) when building docs so that local