eLua - suppress warnings in common_uart.c, shell.c
Doc - inthandlers - int handler example code, open port, define uart to use
eLua - Add WO file system to path, also allow platform to override LUA_PATH_DEFAULT
CAN - use PLATFORM_CAN_MAXLEN instead of 8 for CAN buffers, etc.
LM3 Platform - CAN consts for initial speed, message objects, flags use bytes instead of longs
LM3 Platform - conf.lua - fix definition of cpu variable, also use of undefined variable board
Merge pull request #26 from ecdr/MiscUpdates

Misc small updates