Implemented initial NGF support for ringtone handling

Signed-off-by: Tom Swindell <t.swindell@rubyx.co.uk>
Updated packaging .spec file to include ngf-qt dependency

Signed-off-by: Tom Swindell <t.swindell@rubyx.co.uk>
Added ngf startup dependency to systemd service file

Signed-off-by: Tom Swindell <t.swindell@rubyx.co.uk>
Fixed source license headers

Signed-off-by: Tom Swindell <t.swindell@rubyx.co.uk>