AZURE: Find extra wheels to get Python 3.4 working again

Author: effigies

.azure-pipelines/windows.yml

@@ -8,6 +8,8 @@ jobs:
 - job: ${{ parameters.name }}
   pool:
     vmImage: ${{ parameters.vmImage }}
+  variables:
+    EXTRA_WHEELS: "https://5cf40426d9f06eb7461d-6fe47d9331aba7cd62fc36c7196769e4.ssl.cf2.rackcdn.com"
   strategy:
     matrix:
       ${{ insert }}: ${{ parameters.matrix }}
@@ -22,7 +24,7 @@ jobs:
         python -m pip install --upgrade pip setuptools>=30.3.0 wheel
       displayName: 'Update build tools'
     - script: |
-        python -m pip install numpy scipy matplotlib h5py pydicom
+        python -m pip install --find-links %EXTRA_WHEELS% numpy scipy matplotlib h5py pydicom
         python -m pip install nose mock coverage codecov
       displayName: 'Install dependencies'
     - script: |