appveyor.yml: Add Python 3.6 to test matrix.

Author: ramiro

appveyor.yml

@@ -52,6 +52,13 @@ environment:
       VS_VER: "2015"
       INSTANCENAME: "SQL2008R2SP2"
 
+    - PYTHON: "C:\\Python36"
+      PYTHON_VERSION: "3.6.1"
+      PYTHON_ARCH: "32"
+      ARCH: x86
+      VS_VER: "2015"
+      INSTANCENAME: "SQL2008R2SP2"
+
     - PYTHON: "C:\\Python27-x64"
       PYTHON_VERSION: "2.7.9"
       PYTHON_ARCH: "64"
@@ -80,6 +87,13 @@ environment:
       VS_VER: "2015"
       INSTANCENAME: "SQL2008R2SP2"
 
+    - PYTHON: "C:\\Python36-x64"
+      PYTHON_VERSION: "3.6.1"
+      PYTHON_ARCH: "64"
+      ARCH: x86_64
+      VS_VER: "2015"
+      INSTANCENAME: "SQL2008R2SP2"
+
 
     - PYTHON: "C:\\Python27"
       PYTHON_VERSION: "2.7.9"
@@ -109,6 +123,13 @@ environment:
       VS_VER: "2015"
       INSTANCENAME: "SQL2012SP1"
 
+    - PYTHON: "C:\\Python36"
+      PYTHON_VERSION: "3.6.1"
+      PYTHON_ARCH: "32"
+      ARCH: x86
+      VS_VER: "2015"
+      INSTANCENAME: "SQL2012SP1"
+
     - PYTHON: "C:\\Python27-x64"
       PYTHON_VERSION: "2.7.9"
       PYTHON_ARCH: "64"
@@ -137,6 +158,13 @@ environment:
       VS_VER: "2015"
       INSTANCENAME: "SQL2012SP1"
 
+    - PYTHON: "C:\\Python36-x64"
+      PYTHON_VERSION: "3.6.1"
+      PYTHON_ARCH: "64"
+      ARCH: x86_64
+      VS_VER: "2015"
+      INSTANCENAME: "SQL2012SP1"
+
 install:
   # If there is a newer build queued for the same PR, cancel this one.
   # The AppVeyor 'rollout builds' option is supposed to serve the same