Merge remote-tracking branch 'origin/develop' into webrtc-to-js

.docker/Dockerfile

.docker/develop/Dockerfile

.docker/release-candidate/Dockerfile

.meteor/packages

.meteor/release

.meteor/versions

.sandstorm/sandstorm-pkgdef.capnp

.scripts/set-version.js

.scripts/version.js

.snapcraft/README.md

.snapcraft/candidate/snapcraft.yaml

.snapcraft/edge/snapcraft.yaml

.snapcraft/resources/preparecaddy

.snapcraft/resources/preparemongo

.snapcraft/resources/restoredb

.snapcraft/stable/snapcraft.yaml

.travis.yml

.travis/setartname.sh

.travis/snap.sh

client/methods/deleteMessage.js