Add pre-commit files and linting using pre-commit

tox.ini

@@ -1,11 +1,10 @@
 [tox]
 # if you change the envlist, please update .travis.yml file as well
 envlist=
+  linting
   py{27,34,35,36}-pytest{34,35,36}
   py{27,36}-pytest36-pexpect
   py{27,36}-pytest{master,features}
-  flakes
-  readme
 
 
 [testenv]
@@ -28,16 +27,11 @@ commands=
   py.cleanup -aq
   pytest {posargs}
 
-[testenv:flakes]
+[testenv:linting]
 changedir=
-deps = flake8
-commands = flake8 setup.py testing xdist
-
-[testenv:readme]
-changedir =
-deps = readme
-skip_install = true
-commands = python setup.py check -r -s
+deps =
+  pre-commit
+commands = pre-commit run --all
 
 [testenv:release]
 changedir=