ofono: implement connection manager/context interfaces

Open-WebOS-DCO-1.0-Signed-Off-By: Simon Busch <morphis@gravedo.de>
telephony: unregister service driver on plugin removale

Open-WebOS-DCO-1.0-Signed-Off-By: Simon Busch <morphis@gravedo.de>
telephony: move luna service registration into service component

Open-WebOS-DCO-1.0-Signed-Off-By: Simon Busch <morphis@gravedo.de>
telephony: move some code to the right place in misc area

Open-WebOS-DCO-1.0-Signed-Off-By: Simon Busch <morphis@gravedo.de>
wan: implement basic infrastructure for com.palm.wan service

Open-WebOS-DCO-1.0-Signed-Off-By: Simon Busch <morphis@gravedo.de>
Rework driver registration functionality to be service instance independent

Open-WebOS-DCO-1.0-Signed-Off-By: Simon Busch <morphis@gravedo.de>
Install log handler as early as possible

Open-WebOS-DCO-1.0-Signed-Off-By: Simon Busch <morphis@gravedo.de>