Create support for wrapping connection object to MiniProfiler

[gkathire]

Typically in most of the MicroORM we have access to the DBConnection, so it is very easy to wrap them with the MiniProfiler. Since the DBConnection is a readonly property, please create a mechanism to to wrap the connection object to MiniProfiler. It would nice if you can create a factory method like that of the implementation in Siso-DB - https://github.com/danielwertheim/SisoDb-Provider/tree/master/Source/Projects/SisoDb.MiniProfiler

[gkathire]

Pull request #46 is makes it possible to wrap the connection. Closing the ticket.