added id for Piston Extension
added id for Piston Extension

ID 34 is the head of a Piston and ID 36 is a technical block describing
all the stuff moved by the Piston. But Í have no idea about a good
color.

EtlamGit/minutor,mrkite/minutor,Metibor/minutor,mrkite/minutor,EtlamGit/minutor,mrkite/minutor,EtlamGit/minutor,Metibor/minutor,EtlamGit/minutor,Metibor/minutor,mrkite/minutor,Metibor/minutor,Metibor/minutor,EtlamGit/minutor,mrkite/minutor