Added a function for sending a log message over KISS to the host.

[alligitor]

Simple function that uses CMD_LOG opcode for sending a string to the host. Message has: Log Level Tag Length of message Message

It has a limit of 256 characters for the message.

Messages are not \0 terminated since there is a length field.

I do have a concern about this code but not sure if it's a problem. The code allocates a 257 byte buffer on the stack.. It is kinda large for embedded systems. Not sure if this is acceptable.

Mark is working on a more robust/comprehensive logging system. Feel free to decline if not in line with future plans.