made the beam reflector a tile entity

also put all images in gfx. the beam reflector as of now does nothing.
you can open it and put one item in it. later on it will be used for
only crystals and will be used to create other types of liquids.
made the heat conductor a tile entity

has no functionaility. in the future it will take in fuels and output
heat to the block above for example the liquid container.