Revert changes and use python 3.3 for the tox python

Author: itziakos

appveyor.yml

@@ -9,18 +9,18 @@ environment:
   toxenv: "cp27,cp34,cp35,cp36,cp37"
 
   matrix:
-    - TOXPY27: "C:\Python27-x64\python.exe"
-      TOXPY34: "C:\Python34-x64\python.exe"
-      TOXPY35: "C:\Python35-x64\python.exe"
-      TOXPY36: "C:\Python36-x64\python.exe"
-      TOXPY37: "C:\Python37-x64\python.exe"
-      PREFIX: "C:\Python36-x64"
-    - TOXPY27: "C:\Python27\python.exe"
-      TOXPY34: "C:\Python34\python.exe"
-      TOXPY35: "C:\Python35\python.exe"
-      TOXPY36: "C:\Python36\python.exe"
-      TOXPY37: "C:\Python37\python.exe"
-      PREFIX: "C:\Python36"
+    - TOXPY27: "C:/Python27-x64/python.exe"
+      TOXPY34: "C:/Python34-x64/python.exe"
+      TOXPY35: "C:/Python35-x64/python.exe"
+      TOXPY36: "C:/Python36-x64/python.exe"
+      TOXPY37: "C:/Python37-x64/python.exe"
+      PREFIX: "C:/Python33-x64"
+    - TOXPY27: "C:/Python27/python.exe"
+      TOXPY34: "C:/Python34/python.exe"
+      TOXPY35: "C:/Python35/python.exe"
+      TOXPY36: "C:/Python36/python.exe"
+      TOXPY37: "C:/Python37/python.exe"
+      PREFIX: "C:/Python33"
 
 matrix:
   fast_finish: true
@@ -33,7 +33,7 @@ cache:
   - C:\Users\appveyor\AppData\Local\pip\Cache -> appveyor-cache.txt
 
 init:
-  - ps: $Env:path = $Env:PREFIX + ";" + $Env:PREFIX + "\Scripts;" + $Env:path
+  - ps: $Env:path = $Env:PREFIX + ";" + $Env:PREFIX + "/Scripts;" + $Env:path
 install:
   - cmd: python -m pip install -rtox-requirements.txt
 test_script: