Added 2 Operations to Batch Methods to rest.rb

Modified the neography/rest.rb 'get_batch' to add a case for
 :remove_node_from_index
 :delete_node
Both method use the HTTP DELETE Methods and contain no 'body'

Did not account for alias :remove_node_index

Still need to add tests.

lib/neography/rest.rb

@@ -473,7 +473,15 @@ def get_batch(args)
             else
               {:method => "POST", :to => @cypher_path, :body => {:query => args[1]}}
             end
-          else
+          when :remove_node_from_index
+		  	case args.size
+				when 5 then {:method => "DELETE", :to => "/index/node/#{args[1]}/#{args[2]}/#{args[3]}/#{get_id(args[4])}" }
+				when 4 then {:method => "DELETE", :to => "/index/node/#{args[1]}/#{args[2]}/#{get_id(args[3])}" }
+				when 3 then {:method => "DELETE", :to => "/index/node/#{args[1]}/#{get_id(args[2])}" }
+			end
+		  when :delete_node
+		   	{:method => "DELETE", :to => "/node/#{get_id(args[1])}"}
+		  else
             raise "Unknown option #{args[0]}"
         end
      end