Adding the axes from AlexDGr8r's Falling Meteors mod to the default config.

Not tested at all, since I don't really feel like setting up a build environment for this right now.  FWIW, I did painstakingly compare this addition with the Mekanism version and the .cfg file that gets generated for it, so that I'm as sure as I can be about its correctness.

I am not AlexDGr8r, nor have I contacted him about this.