Added documentation on rom tools compiling

[NonstickAtom785]

Added in an example showing how to compile romgen and convertsav using a gcc compiler. I figure gcc was the most commonly used and is supported on a very wide variety of devices.

[Eeems]

It would probably make more sense to add a makefile

[NonstickAtom785]

It would probably make more sense to add a makefile

Oh good idea! Thanks!