Create end-to-end functional test to validate dotnet-razor-tooling functionality.

[N. Taylor Mullen]

Command line applications today are not easy to test. Also, with the recently added dispatch logic testing is even more difficult. Nevertheless we should still create an end-to-end functional test to ensure we don't regress anything. It will do:

1. Pack dotnet-razor-tooling
2. Build a local package directory to use for the test
3. dotnet restore the test project
4. dotnet build the test project
5. Invoke dotnet-razor-tooling on the test project.
6. Cleanup or git ignore any artifacts.

[Eilon Lipton]

Moving to 1.0.1

[N. Taylor Mullen]

Gonna wait to complete this one until this has been completed.

[N. Taylor Mullen]

1cc4498