* Added cancel_i2c_trans extern bool to allow canceling a blocked i2c transaction.
* FX1 development board debug light addresses.
* Various other minor bug fixes/optimizations.
+ * remove usbjt.h. In place, use autovector.h. jump table routines no longer
+ need defined in your firmware. fx2.lib contains default routines. Override
+ them with interrupt handlers you want to handle.
+ * added fx2ints.h. Interrupt numbers/macros for standard fx2 interrupts.