Merge pull request #78 from colonwq/is_connected

Add is_connected property to NetworkBase class

Author: makermelissa

adafruit_portalbase/network.py

@@ -686,3 +686,8 @@ def process_json(self, json_data, json_path):
 
             values = json.dumps(json_data)
         return values
+
+    @property
+    def is_connected(self):
+        """Return whether we are connected."""
+        return self._wifi.is_connected