Fix: correct method name

- a bug found when testing this
version of the pypuppet code with
a current version of Puppetboard
(v3.0.0).

Author: Greg Dubicki

pypuppetdb/types.py

@@ -82,7 +82,7 @@ def __str__(self):
         return str('{0}').format(self.__string)
 
     @staticmethod
-    def get_from_dict(event):
+    def create_from_dict(event):
         return Event(
             node=event['certname'],
             status=event['status'],