Updated appveyor config

Author: Dan

appveyor.yml

@@ -120,7 +120,7 @@ cache:
 test_script:
   # Run the project tests
   - "%PYEXE% setup.py nosetests"
-  - "%PYEXE% -c 'import sys; sys.version_info >= (3,) and sys.exit(1)' || eval \"2to3 -nw embedded_server\*.py && 2to3 tests\*.py -o tests3 -nw && cp tests\test_client_private_key* tests3\ && %PYEXE% setup.py nosetests -w tests3\""
+  # - "%PYEXE% -c 'import sys; sys.version_info >= (3,) and sys.exit(1)' || eval \"2to3 -nw embedded_server\\*.py && 2to3 tests\\*.py -o tests3 -nw && cp tests\\test_client_private_key* tests3\\ && %PYEXE% setup.py nosetests -w tests3\\""
 
 after_test:
   # We already built the wheel during build_script, because it's