Move module settings to per module file
Update build system to support module settings files

This allows us to have module setting stored locally with each module
Update SConstruct files to include local module settings
Update pic24 library to be slimmer on pic24f16ka101

Current version include many mainboard specific routines like
system_log, flash_queue and flash_block that require a flash memory
chip.  The FSU does not have one so it cannot use these routines.

The routines were making the code size too big to fit on the chip.