Patch note

March 26, 2018

Allow downloading execution logs through the web client.
Show execution durations in more human-readable format.
Developer Comment: "1 day, 19 hours" says a lot more than "156742 seconds".
Command-line client properly hides deleted executions.
Developer Comment: We use soft delete approach where executions are kept for a while before actual deletion to allow undoing the removal. Command-line client didn't filter out these deleted executions.