Added support for MySqlErrorStore
Fixed commented-out typo in web.config
Tidied MySQL script.

Also added mention of mysql in the readme, and some clearer examples of
using mySQL in the web.config.
Typo on the update dupe count query
Merge remote-tracking branch 'upstream/master'
MySQL Error Store now in own project

Moved the MySQLErrorStore into it's own project with reference.
Removed all MySQL traces from main project.
Merge pull request #49 from mediaburst/master

Support for MySQL