Various updates and new features

- Brooklyn 0.6.0 support
- Internal BIND DNS server for name resolution between nodes
- New provider support including GCE, vcloud-director and others
- Pure Java with new Brooklyn interfaces
- Better documentation and startup scipt

**Important** `BindDnsServer` and `VCloudDirectorLocation` are not available publicly in Brooklyn yet
- https://github.com/brooklyncentral/brooklyn/pull/810