Updating dev Nuget.config
Modify Program.cs to return failure code when tests fail

The TeamCity visitor does not collate summary messages and consequently
prints messages but fails to report an error code. This causes TeamCity to
fail the build, but pass the step
Removed source files from the project
Updated to use the new target framework in project.json
Updated build.cmd
Fix for testing #38 - VS cannot run [Theory] tests with multiple
parameters

The problem here is the way we're using for VS to communicate with the
test runner via the commandline isn't very well suited for the problem
space.

If VS wants to run MyTestClass.Test1 and MyTestClass.Test2 then it will
build a commandline like:

k test --design-time --test MyTestClass.Test1,MyTestClass.Test2

The runner knows to split the argument on , or ; and then we have the test
names to run. This is problematic when the test name contains either of
these characters.

This change implements context-aware splitting on , - a comma inside
parens is not treated as a delimiter, as well as a host of other parameter
passing options.

For now this is compatible with what VS does. We might want to remove
support for delimiters and choose a better option.
React to renaming TargetFramework to RuntimeFramework
Temporary rollback to make build of KRuntime pass
Restore reaction to renaming TargetFramework to RuntimeFramework