Adds Chat Logger

* Allows logging of public chat, whispers, and gm command usage to the
SQL database
* Features can be turned on or off using [log.conf]
* SQL update provided
* Features are off by default
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* Fixes bad prefix stripping method for command logger
Follow up of cd5c61b

* Prefix stripping inproved. (Thanks Xcelled194)
Updated Main.sql for chat logger

Included ImaBrokeDude's sql update into the main.sql for his chat logger.
Merge pull request #1 from Fuhhue/master

Updated Main.sql
Merge pull request #22 from ImaBrokeDude/master

Adds Chat Logger