New snapd 2.18 release and new candidate core snap

Hi, The Snappy Team are happy to announce that the 2.18 release of snapd is available on GitHub [1]. We have also released a new version of the "core" snap that contains this version of snapd into the "candidate" channel. On your Ubuntu Core 16 devices please run: $ snap refresh --candidate core to refresh to this release and to help us testing by reporting any bugs to the snapd project in Launchpad [2]! Package updates for the classic distros will follow shortly. Just some of the highlights from this release: - `snap info <name|path>` shows details about the given snap. Error handling still needs some work. - `snap find` without further arguments shows the featured snaps - `snap find --section=<name>` is supported. Section discovery still needs work (but tab completion should work). - `snap install/remove/refresh <snapname>` will not error with an exit code 1 if the snap is already in the desired state - `snap watch <change-id>` shows progress information for in-progress changes. Doesn't yet summarise. - foundational work by the OLS team for delta downloads - more robust against network issues, retry a lot of operations - `snap try` will try to guess the right directory if inside a Snapcraft project directory or unpacked snap - snap refresh will show what snaps got refreshed in the generated snap change - snap list --all shows all revisions of all snaps installed on the system, including disabled ones. - fix incorrect handling of jailmode - fix overly aggressive garbage collection - make snap login prompt for email address if not given at the commandline - add more static analysis tools (misspell, ineffassign) and fix all issues found - support screenshots via the client reset API - resume partial downloads - export per-snap XDG_RUNTIME_DIR per user - interfaces: - fixes for browser-support, fctix, process-control, misc policy updates - new interfaces: raw-usb, avahi-observe, alsa, i2c, ofono, lxd-client Please let us know if you notice any issues and enjoy the new release! Cheers, Michael (on behalf of the snappy team) [1] https://github.com/snapcore/snapd/ [2] https://launchpad.net/ubuntu/+source/snapd