v1.7

Release v1.7

- /timestamp: Toggle timestamps after 30min of inactivity.
- /shrug: ¯\_(ツ)_/¯
- /name: Colorize output with active theme. (#249)
- /nick: Fixed announcing when it's the same nick. (#237)
- /whois: Strip control characters from metadata inputs. (#257)
- /uptime and /whois relative timestamps made more precise. (#259)
- dev: Various docs and tests-related fixes.
- dev: Switched to dep for pinning dependencies.
- dep: Pinned new golang.org/x/crypto which includes chacha20-poly130
  support for ssh.
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