fixed most of py3 warnings, output is much cleaner this way

appveyor.yml

@@ -22,6 +22,7 @@ install:
   - pip install codecov
   - git submodule update --init --recursive
   - pip install pycrypto
+  - pip install pypiwin32
   # Check that we have the expected version and architecture for Python
   - "python --version"
   - "python -c \"import struct; print(struct.calcsize('P') * 8)\""