Merge branch 'qa' of https://github.com/blueyed/jedi

Made some slight adaptions

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py27, py35, py36, py37
+envlist = py27, py35, py36, py37, qa
 [testenv]
 extras = testing
 deps =
@@ -37,3 +37,8 @@ commands =
 commands =
     {envpython} -c "import os; a='{envtmpdir}'; os.path.exists(a) or os.makedirs(a)"
     {envpython} sith.py --record {envtmpdir}/record.json random {posargs:jedi}
+[testenv:qa]
+# Ignore F401, which are unused imports. flake8 is a primitive tool and is sometimes wrong.
+commands = flake8 --extend-ignore F401 {posargs:jedi}
+deps =
+extras = qa