Added ServiceStack OrmLite v4 to the benchmark tests

I added ServiceStack OrmLite v4 to the tests. For me, on my local machine, the results for ServiceStack OrmLite were right in between Dapper and LLBLGen (without caching), which is exactly what I would have expected.

I also refactored a couple things, to make it work on my machine, might help the community if they try to run it. By allowing the program to run completely off connection strings in the app.config. I also changed the select * from, to an explicit select [field1], [field2] from statement, as for some reason I didn't have the ContactID column in my table and I had to add it and re-ordering columns in a table is a pain (feel free to roll it back if that's not desired). Maybe I have a weird setup.

Otherwise, the code for servicestack is straight forward, I also added the servicestack binaries via nuget.