Added the .NET ServiceStack framework

Added the .NET `ServiceStack` framework.

Implemented the JSON, Single DB query (mysql), and Multi DB query
(mysql) tests.

Benchmark has successfully been run using `mono` on a linux host.
Windows support has *not* been tested!

The setup scripts are more or less copied from the existing `aspnet`
framework test project, with minor tweaks to reference framework
specific filenames.
Fixed invalid paths in servicestack\setup.xsp.py
Cleaned up version refs in README.md
Updated `queries` request in `servicestack`

Updated the `queries` request handler to honor the FrameworkBenchmark's
specification that requires multi-db requests "counts" value to between
1 and 500.

Also changed the TODO about running tests in parallel.  Parallel tests
are acceptable, but need additional testing to verify performance gains.
Merge branch 'servicestack' of https://github.com/kppullin/FrameworkBenchmarks into kppullin-servicestack
update sort order