Add train support for transferring pressure

[SuperArcherG]

Would be cool to transfer pressure on trains

[Lgmrszd]

It was mentioned earlier but you can just use Charging module on a Portable Storage Interface and fill storage with Air Tanks. Does that work for you?

[Lgmrszd]

Actually I will consider it for two reasons:

1. Simpler schedule condition
2. Some sort of Air Engine for trains as an alternative for using fuel