v2.1.0

Added

• NOTI_SOUND_FAIL tells Noti which sound to play for banner notifications
  when a utility fails on OS X.
• NOTI_SOUND and NOTI_SOUND_FAIL can be set to _mute for silent
  notifications.
• HipChat notifications.
• Pushover notifications.
• Noti Wiki.

Changed

• On OS X, banner notifications will play different sounds depending on the
  utility's success or failure, instead of the same sound for both.
• NOTI_SLACK_DEST no longer defaults to "#random". It must be manually set.