allowing Node.load and Node.create to be overridden

lib/neography/node.rb

@@ -13,7 +13,7 @@ def create(*args)
         # the arguments can be an hash of properties to set or a rest instance
         props = (args[0].respond_to?(:each_pair) && args[0]) || args[1]
         db = (args[0].is_a?(Neography::Rest) && args[0]) || args[1] || Neography::Rest.new
-        node = Neography::Node.new(db.create_node(props))
+        node = self.class.new(db.create_node(props))
         node.neo_server = db
         node
       end
@@ -25,7 +25,7 @@ def load(*args)
         # a db instance can be given, it is the first argument or the second
         db = (args[0].is_a?(Neography::Rest) && args[0]) || args[1] || Neography::Rest.new
         node = db.get_node(node)
-        node = Neography::Node.new(node) unless node.nil?
+        node = self.class.new(node) unless node.nil?
         node.neo_server = db unless node.nil?
         node
       end