Fixed borked deployment
Tell Git it shouldn't modify ClickOnce files, otherwise we get a hash mismatch
Create an uninstaller entry for the Squirrel version
Inlcude Squirrel.exe in the test app nuspec file, so we can run the uninstaller in our integration tests

Also rig the .gitignore file to include the .nupkg file, we need to store it in source control
Cleanup after ourselves