src: rename node to io.js for Windows installer

* quote "NODE_VERSION_STRING" in node.rc to allow for complex version
  strings
* change user-facing strings
* make sure .bat files are crlf

PR-URL: https://github.com/iojs/io.js/pull/291


Reviewed-By: Bert Belder <bertbelder@gmail.com>
Reviewed-By: Nikolai Vavilov <vvnicholas@gmail.com>