Add policy rules.
Add missing resource_class_request/4.
Add missing accessory 'incompatible'.
Add missing snap_button resource/class mapping
Merge branch 'master' into n900

n950-n9 adaptation and n900 adaptation are mostly identical,
so after moving general content from n950 branch to master
merge master to n900 to get to same position.

Conflicts:
	basic/policy/audio_route_rules.pl
	basic/policy/hwconfig.pl