Factory components

Start of my Rivtech facility work
-Added some new items in json parts file to make it easy to find items that have no other purpose than being parts in recipes.
-Added a new material rubber-low bashing and cut resistance, but high electrical resistance(like real life!).
-Basic factory components PLC, conveyor, hopper and industrial ammunition loader(just for decoration right now).  I think Arcadia said that he is adding heavy machinery and other factory stuff.

Not sure if I should add everything at once, or do pull requests piecemeal.  I'm rather new at using git so I'm not sure what is the standard here.