Merge pull request #112 from ujjwalt/patch-1

Use <= instead of inspect to cater to subclasses of Neography::Node

lib/neography/index.rb

@@ -25,7 +25,7 @@ module ClassMethods
       def find(*args)
         db = args[3] ? args.pop : Neography::Rest.new
 
-        if self.inspect == "Neography::Node"
+        if self <= Neography::Node
           nodes = []
           results = db.find_node_index(*args)
           return nil unless results