Merge pull request #38 from kaitai-io/restrict_python_versions

Restrict compatible Python versions to 2.7 and 3.4+

Author: GreyCat

setup.cfg

@@ -16,7 +16,6 @@ classifiers =
     Programming Language :: Python :: 2
     Programming Language :: Python :: 2.7
     Programming Language :: Python :: 3
-    Programming Language :: Python :: 3.3
     Programming Language :: Python :: 3.4
     Programming Language :: Python :: 3.5
     Programming Language :: Python :: 3.6
@@ -28,6 +27,7 @@ classifiers =
 zip_safe = True
 include_package_data = True
 py_modules = kaitaistruct
+python_requires = >=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*
 
 [bdist_wheel]
 # This flag says that the code is written to work on both Python 2 and Python