Updating dev NuGet.config
*Adding ThrowsArgOutOfRange method to ExceptionAssert

* Changing error messages to use Environment.NewLine
Renaming PlatformHelper to TestPlatformHelper and making the type public
Adding TestHost as a separate project from design-time-host
Made some changes
- Show help when no arguments were specified.
- Changed port and project to be optional
- Made xunit.runner depend on TestHost by default
Updated to use the new target framework in project.json
Cleaned up the test host logic a little bit
- Parse arguments after executing the command
- Clean up how help is displayed if no subcommands are run
Added the TestAdapter project
Fixup references
Rename namespace
adding tests for testhost
Disable core clr tests for now since JSON.NET fails
Enable a single test to to diagnose CI failures
Remove framework assembly versions
Added support for acks from the host
- The framework host should wait for an ack from the client
before quitting.
- Reenabled the tests
Make the test host launch a process.
Skipped tests again
Reacting to CLR package versioning changes