Fixed "too long command line" error (passing arguments via args file)

[lucaslorentz]

If you try to compile a lot of files, it will raise an error saying that the command line is too long. I've changed the plugin to write all arguments on a file and pass it to tsc using the @file option.

[lucaslorentz]

Sorry, I will update/fix the tests and submit it again.

[jstclair]

+1 This is killing us with a moderately-size project