* Remove JSInterop files from this repo
* Add jsinterop submodule
* In Blazor.sln, reference jsinterop projects from submodule
* Update other references to jsinterop
* Fix TypeScript warning
* Include submodules in test/pack
* Update to newer jsinterop to fix JS pack issue
* Update to newer jsinterop to obtain strong naming
* Allow jsinterop submodule to inherit Directory.Build.props/targets
* Get latest jsinterop
* For AppVeyor builds, restore git submodules (happens automatically elsewhere)
* Update README.md with instructions to restore submodules
Steve Sanderson