add kdbus.txt and move examples from the code to it
kdbus.txt: update
implement some more ioctl stubs and make CMD_HELLO return success
kdbus.txt: update
kdbus.txt: update
kdbus.txt: update
kdbus.txt: more text
kdbus.txt: add links
kdbus.txt: add Messages
kdbus.txt: message exchange example
kdbus.txt: update
kdbus.txt: spell check
Merge ../d-bus into kdbus