Explain that the cport number is stored in greybus header.
That particullary important because other controller like
TPC/IP can open one communication channel per cport,
and doesn't need to keep it in the header.

Signed-off-by: Alexandre Bailon <abailon@baylibre.com>

Explain what is GBridge and,
speak a litle about the architecture.

Signed-off-by: Alexandre Bailon <abailon@baylibre.com>

This application connects to greybus netlink host device.
The main is goal is to give a way to resgister
a host device driver in user space.

Signed-off-by: Alexandre Bailon <abailon@baylibre.com>