now the insulated wires change their color when are turned on

The node property is_sticky_piston was applied to piston_up_normal rather than piston_up_sticky.

Conflicts:
	mesecons/internal.lua
	mesecons/wires.lua
	mesecons_pistons/init.lua

Add rule-name system. Every input rule can now have a name, that could help e.g. the microcontroller to know where a signal comes from.

Conflicts:
	mesecons_pistons/init.lua

Place up/down pistons automatically depending on the player look direction, remove the craft recipes for up/down pistons, and unify all the pushing/pulling behaviors into mesecon:piston_push(pos) and mesecon:piston_pull(pos).

Conflicts:
	mesecons/internal.lua