Moved code form motor3/rev_c to motor3/rev_d.
Partitioned motor3.c code to have separate header files
in common directory.  Added common/common.mk to simplify
Makefiles.  Added structure names to Uart structures in
cmcis/core/include/LPC17xx.h .
Yanked the sharable code from motor3/rev_d/motor3.c and
stuffed into a bunch of .c files in common.