Merge pull request #2249 from metabase/finalize-version

finalize 0.16.0 release version.

bin/version

 #!/usr/bin/env bash
 
-VERSION="v0.16.0-snapshot"
+VERSION="v0.16.0"
 
 # dynamically pull more interesting stuff from latest git commit
 HASH=$(git show-ref --head --hash=7 head)            # first 7 letters of hash should be enough; that's what GitHub uses