Release version 0.4.0
Changelog:
- Agents can now claim ownership or be responsible for parts of O-DF tree
- Automatic removing of snapshots that are not needed
- Buffering for messages with callback
- Consistent behaviour for description
- Fixed polled interval subscriptions
- Possibility to remove Objects and InfoItems using command line interface
- Improved web client object selection and deselection
- HTTP and O-MI response codes are now separate
- Remove blocking code from the message handling