Fixed IE9 issue of hbs templates not getting rendered when the url was a relative URL.

fetchText was enhanced in a recent pull request to handle cross domain requests. But it misses the possibility that the URL can be a relative url. This becomes issue for IE9 in latest 0.5.0 labelled release. The templates do not get rendered as their cross domain request fails for the relative url

More details in code review comments added to [this commit](https://github.com/rkstar/require-handlebars-plugin/commit/e185bb6f2b71d6cf327f63d280019eb011f954df).

Let me know if you need any other information.