cmd+/ 'comment' keymap in JSP now uses JSP-style comments rather than XM...

This is to address issue #3.
* I first referred to the cmd+/ keymap from the [language-xml](https://github.com/atom/language-xml/blob/master/scoped-properties/language-xml.cson) package. 
* I then updated commentStart and commentEnd with the correct JSP syntax
* I lastly tested in Atom developer mode.