Simplified / cleaned up the Makefile to match Travis (just use tox)

Author: IanLee1521

Makefile

@@ -2,16 +2,5 @@ release:
 	umask 022 && chmod -R a+rX . && python setup.py sdist bdist_wheel
 	# twine upload dist/*
 
-test :
-	python pycodestyle.py --testsuite testsuite
-
-selftest :
-	python pycodestyle.py --statistics pycodestyle.py
-
-doctest :
-	python pycodestyle.py --doctest
-
-unittest :
-	python -m testsuite.test_all
-
-alltest : test selftest doctest unittest
+test:
+	tox