Adds library to parse time like "5m" and separate the number from the unit
Refactors reminder plugin to use time unit parser
Removes debugging code
Adds a check to isMessagingBot make sure words has something in it before checking if nick is present
splitMessageIntoWords now removes empty elements when splitting message into words
Adds mute duration config option: when you mute someone and don't specify a duration, it will expire after
the configuration duration (5m for example)

Adds mute duration option for the mute command (5m for example)