Breaking changes:
- minimum Go toolchain version is now 1.7
New features:
- machine1: add methods ListMachines, ListImages, GetMachineAddresses
Other changes in this release:
- dbus: Fix API break from godbus
- unit: use ContainsAny instead of IndexAny
- journal: fix validation of key names
- docs: Add more detail to Conn.ListUnits
- tests/activation: fix local test run
- test/journal: add some send tests