Update SS dlls
Add test for DomainUser SaveReferences issue
Modify example to show executing within a transaction
Some failing tests for OrderByDescending.
Merge pull request #427 from jrmitch120/OrderByDescendingFailingTests

Some failing tests for OrderByDescending.
Add example of sorting multiple columns by descending
Fix remaining order by tests
Update SS dlls
Merge pull request #2 from ServiceStack/master

合并原作者更新