Enable reports to be run on the remote db with per report settings

This pull request is for Issue #26 

New table column is added to track if the report is meant to be on the local or remote database. Also I removed the DB connection from the SQL report class as I wasn't sure if it was meant to be referenced twice. It looks like it should take the parent report.class.php settings, or at least be configured the same way.

Let me know if any changes need to be made.