added useful packages to joule venv

modules/python_venvs/manifests/install.pp

@@ -17,7 +17,8 @@ class python_venvs::install{
   }
 
   $ww_pip_url = "https://pypi.wattsworth.net"
-  $joule_pip_pkgs=['joule','LabJackPython','joulelabjack','ipykernel']
+  $joule_pip_pkgs=['joule','LabJackPython','joulelabjack','ipykernel',
+                  'matplotlib','scipy','pandas','sklearn']
 
   python::pip{$joule_pip_pkgs:
     install_args => "--upgrade --extra-index-url $ww_pip_url",
@@ -43,4 +44,4 @@ class python_venvs::install{
     }
   }
 
-}
\ No newline at end of file
+}