Rename client example

Signed-off-by: Stéphane Depierrepont <toorop@toorop.fr>
remove unused type

Signed-off-by: Stéphane Depierrepont <toorop@toorop.fr>
add unsubscribe to channel & unbind event

Signed-off-by: Stéphane Depierrepont <toorop@toorop.fr>
Clean

Signed-off-by: Stéphane Depierrepont <toorop@toorop.fr>