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