LM3 Platform - LM4F Wide timers
CAN - use PLATFORM_CAN_MAXLEN instead of 8 for CAN buffers, etc.
LM4 - Fix interrupt definitions in LM3 platform, better handling CORTEX_M4
eLua - Add WO file system to path, also allow platform to override LUA_PATH_DEFAULT
Doc - inthandlers - int handler example code, open port, define uart to use
eLua - suppress warning in common_uart
LM4 - Restore eLua ints to CPU module.  Think this needed in other lm3 as well
eLua - shell - suppress warning message
todo notes
LM3 Platform - CAN flags bytes instead of longs
LM3 Platform - conf.lua - fix definition of cpu variable,
also use of undefined board variable