Support for SQL Server (2008 / 2012)

Hello Tomasz,

I just read your article on dzone:
http://architects.dzone.com/articles/spring-data-jdbc-generic-dao
... and I thought I could help.

I tested your framework against sqlserver 2008 / 2012 and 
added the missing sql server support to make all unit-tests pass.

So feel free to pull my master-branch if you want to :)

Best regards,
Tom