Add plugin for pew

plugins/pew/pew.plugin.zsh

@@ -0,0 +1,10 @@
+
+if type pew > /dev/null; then
+    # Use the completion already shipped by the python package
+    shell_config_path=$(dirname $(pew shell_config))
+
+    fpath+=$shell_config_path
+    compinit
+else
+    echo "`pew` command seems to not exist. Check that it is available in your PATH"
+fi