v4.0.0

- Only launch one D-Bus instance for all connections
- Add support for Dial("tcp:host=..,port=..")
- Add support for the ALLOW_INTERACTIVE_AUTHORIZATION flag
- Fix introspection of subpath
- Refactor export code to allow a method table to be provided
- get godbus/dbus to compile on Solaris
- prop: fix interface name in IntrospectDataString
- conn_test.go: fix nil dereference
- conn: fix RemoveSignal and add test
- add AddMatchSignal method

v3

- Add BusObject interface
- Add ExportSubtree functions for subtree support
- Add ExportWithMap method to support exporting
  lower-case method names
- Fix mutex unlocking when releasing object
- Fix encoder alignment
- Fix nil dereference
- Used NameAcquired/NameLost signals to track names

v2

- Prevent double-close panic in conn.Close
- Fix flaky tests: don't rely on map iteration order.
- go vet: fix raw struct initialization
- worker: don't drop signals
- Add UnixCredentials system call for DragonFly BSD
- XML doctype declaration for introspection
- decouple connections from unixTransport

v1

fix(README): update the URLs