[rilmodem][WIP] USSD (Unstructured Supplementary Service Data) functionality

Signed-off-by: Martti Piirainen <martti.piirainen@tieto.com>
[rilmodem][WIP] USSD (Unstructured Supplementary Service Data) functionality

Signed-off-by: Martti Piirainen <martti.piirainen@tieto.com>
Merge branch 'master' of https://github.com/marttipiirainen/ofono

Conflicts:
	ofono/Makefile.am
	ofono/drivers/rilmodem/rilmodem.c

Signed-off-by: Martti Piirainen <martti.piirainen@tieto.com>
Start ofono service as user 'radio'

Signed-off-by: Martti Piirainen <martti.piirainen@tieto.com>
Merge pull request #14 from marttipiirainen/master

Add basic USSD support; start ofono service as user 'radio'