smarter param filtering ... note dapper does not support non-ascii named params nicely. the filtering will be a bit wonky

--HG--
rename : Dapper.Contrib/Extensions/SqlMapperExtensions.cs => Dapper.Contrib/SqlMapperExtensions.cs

Added NHibernate test

I don't feel strongly about this change, but I guess it is slightly less "surprising" to have "\u0061\u030a" != "\u00e5"

added test for TVP

Added support for table name attribute on POCO class, should work with ANY attribute named "TableAttribute" that has a "Name" property for it's value (supplied one, and also tested with the Table-attribute in EntityFramework).  Cleaned up ProxyGenerator for readability.

Add perf test for dapper contrib
Optimise Get perf for dapper contrib

fixed bug in tests, added support for non-tracked concrete class in Get(), emitting a concrete class which seems stupid, but works (due to the generic get method returning both interface and new class)