Use flake8 for codestyle check

Author: jdavies-st

setup.cfg

@@ -129,8 +129,9 @@ exclude = _astropy_init.py,version.py
 # Stricter settings for people who use flake8 in their editors
 [flake8]
 max-line-length = 120
+select = F
 ignore = E226,E402,W503
-exclude = _astropy_init.py,version.py
+exclude = _astropy_init.py,version.py,astroquery/template_module
 
 [coverage:run]
 omit =

tox.ini

@@ -60,8 +60,8 @@ pip_pre =
 changedir = {toxinidir}
 skip_install = true
 description = check code style
-deps = pycodestyle
-commands = pycodestyle astroquery --count
+deps = flake8
+commands = flake8 astroquery --count
 
 [testenv:build_docs]
 changedir = {toxinidir}