Merge pull request #9 from jusa/pa4

Role-based listening time notifier.
[mainvolume] Send HighVolume signal always on mode and call mode change.
[mainvolume] Reset volume to safe level on startup.

If volume is set on accessory with HighVolume defined to a level that is
not safe, when restarting mainvolume module and selecting those steps
for the first time, reset volume to a safe step.
[mainvolume] Add CallState signal.
Merge pull request #10 from jusa/pa4

Improvements to high volume functionality and new CallStatus signal.
[stream-restore-nemo] Use parameter hook for mode change.
[common] Add initial version of shared data.
[mainvolume] Use new shared data object.
[parameters] Use new shared data object.
[voice] Use new shared data object.
[test] Use new shared data object.
[common] Add Nemo related property strings.
[build] Update version.
Merge pull request #12 from jusa/pa4

Use shared data.
[stream-restore-nemo] Request parameter mode changes later.