adds install of netCDF4 in yml files

Author: ThibHlln

.appveyor.yml

@@ -11,6 +11,7 @@ matrix:
 install:
   - "%PYTHON%\\python.exe -m pip install pytest"
   - "%PYTHON%\\python.exe -m pip install spotpy"
+  - "%PYTHON%\\python.exe -m pip install netCDF4"
   - "%PYTHON%\\python.exe -m pip install -e ."
 build: off
 test_script:

.travis.yml

@@ -8,6 +8,7 @@ python:
   - 3.6
 install:
   - pip install spotpy
+  - pip install netCDF4
   - pip install -e .
 script:
   - pytest tests