Set version 0.4.0-devel in 'develop' branch.
Enhance RTCSession in-dialog request handling

- Remove sendACK method
- Remove sendBye method
- New public sendRequest method
Cleanup RTCSession/RequestSender.js
Typo
In dialog request enhancement

'session' property for Dialog renamed to 'owner'. Same for RTCSession applicants 'session' property
Merge branch 'develop' of github.com:versatica/JsSIP into develop
Merge branch 'in-dialog-requests' into develop