v1.00 12/4/2014 - Added bootloader, changed application to load from bootloader

v1.01 3/12/2015 - Bigger Rx buffers, Risi bug fix for OERR

v1.02 3/17/2015 - Interrupt priority fix, change ENTER/EXIT_CRITICAL_REGION

v1.03 3/18/2015 - Add Enter/ExitAppCriticalRegion
		  Clear UxSTA.OERR in Rx int
		  Change reporting of OERR
			
v1.04 3/19/2015 - Remove foreground Rx Buff, make Rx/Tx buffs 1024/512 bytes
		  Change ADC convert limit to 100 ms
			
v1.05 3/26/2015 - Require "+++" to go into configuration mode
		  Coil 13 sends you back to configuration mode

v1.06 4/28/2015 - Added ModBus reg to change ModBus timeout, dflt to 10ms

v1.07 5/4/2015  - Fixed race in returning RX_BYTES_QUEUED