update python versions in setup classifiers

(add python 3.7 and remove 3.4)

Author: gdementen

setup.py

@@ -33,9 +33,9 @@ def readlocal(fname):
     'Programming Language :: Python :: 2',
     'Programming Language :: Python :: 2.7',
     'Programming Language :: Python :: 3',
-    'Programming Language :: Python :: 3.4',
     'Programming Language :: Python :: 3.5',
     'Programming Language :: Python :: 3.6',
+    'Programming Language :: Python :: 3.7',
     'Topic :: Scientific/Engineering',
     'Topic :: Software Development :: Libraries',
 ]