Bus Layer - API

Description of all data structures, definitions and functions in the bus layer:

`CANBUS_DATA`	CAN BUS OBJECT
`CANBUS_PARA`	BUS CONFIGURATION

`CanBusInit()`	INITIALIZE CAN BUS MANAGEMENT
`CanBusIoCtl()`	CAN BUS I/O CONTROL
`CanBusRead()`	RECEIVE CAN FRAME
`CanBusWrite()`	SEND CAN FRAME
`CanBusEnable()`	ENABLE CAN BUS
`CanBusDisable()`	DISABLE CAN BUS
`CanBusTxHandler()`	CAN TX INTERRUPT HANDLER
`CanBusRxHandler()`	CAN RX INTERRUPT HANDLER
`CanBusNSHandler()`	CAN STATUS-CHANGE INTERRUPT HANDLER