I added scripts for running jslint-reporter

Motivation:

  * For integration into the [flycheck][1] repository, syntax checkers need to be executable and in path. I [asked][3] and learned that checkers where users have to do custom setup are not accepted.

  * On Windows, piping Node.js output [doesn't work reliably][2], which again is needed for flycheck. Therefore, a wrapper batch script is unavoidable.

As I am currently on Windows, I accidentally first had wrong line endings in the Unix script. It's fixed and tested now.

[1]: https://github.com/flycheck/flycheck/
[2]: http://stackoverflow.com/questions/18748164/process-exit0-output-disappears
[3]: https://github.com/flycheck/flycheck/issues/208