Add __str__ method for Site

Author: Perseudonymous

datapoint/Site.py

@@ -10,3 +10,11 @@ def __init__(self, api_key=""):
         self.nationalPark = None
         self.region = None
         self.unitaryAuthArea = None
+
+    def __str__(self):
+        site_string = ''
+        for attr, value in self.__dict__.items():
+            to_append = attr + ': ' + str(value) + '\n'
+            site_string += to_append
+
+        return site_string