Adds massive cargo ships to the game, that function similarly to trains. Also adds tanker ships, train bridges. NOTE: In 2.1, You Must Install Oil Rigs Separately!
We might use a table which stores all or_power (on their creation) during powerOilRig() so much less search is needed. Here's my patch: https://pastebin.com/mMMpntGL
I've made some test about add and remove platforms and it looks good. Haven't try this trick too much though but seems like factorio can haddle remove d entities itself so nil content in the table won't crash the game.
