Fix silly-sounding names

While I agree with the capitalization changes that Zefram made, I don't think that the item name is the place to describe the function of a device.

Also, calling something, for example, an "Accelerating Pneumatic Tube Segment" makes it sound like the tube segment itself is accelerating. "Accelerator Pneumatic Tube Segment" is a better way to word it, as that makes it sound more like it is a device used for accelerating (which it is). This is also why the right-side pedal on a car is called the "Accelerator Pedal", and not the "Accelerating Pedal".