New power: Trans-Belt Alliance

Hi,

As long as we're tossing around new nations and powers, I figured I'd add
mine.

The planets of our own solar system seem woefully underrepresented,
so I came up with the Trans-Belt Alliance (actually, I wanted to
build a new fleet, and my friend grabbed Japan).

Unfortunately, these are untested ship designs. I have the names, I have the
designs, but I've only painted a few of the ship minis so far (I've been
finishing minis for DSII and SG).