add new flake8-plugins and revise config

setup.cfg

@@ -9,4 +9,12 @@ universal=1
 [flake8]
 exclude = .git,.tox,.github,.eggs,__pycache__,doc/conf.py,build,dist,capabilities-data,test,src/escpos/constants.py
 max-line-length = 120
-# future-imports = absolute_import, division, print_function, unicode_literals  # we are not there yet
+accept-encoding = utf-8, utf-16
+require-code = True
+# FI12 __future__ import "with_statement" missing
+# FI15 __future__ import "generator_stop" missing
+# FI16 __future__ import "nested_scopes" missing
+# FI17 __future__ import "generators" missing
+# FI5x __future__ import "xxx" present
+ignore = FI12,FI15,FI16,FI17,FI5
+copyright-check = True

tox.ini

@@ -25,7 +25,12 @@ commands = sphinx-build -W -b html -d {envtmpdir}/doctrees .  {envtmpdir}/html
 
 [testenv:flake8]
 basepython = python
-# TODO add flake8-future
+# TODO add flake8-print after adding logging
 # TODO add flake8-docstrings
 deps = flake8
+       flake8-coding
+       flake8-copyright
+       flake8-future-import
+       flake8-quotes
+       flake8-import-order
 commands = flake8