Modified template.js to copy reporter.js to the correct path.

fixes #31 :

If Jasmine's `options.outfile` is changed then coverage doesn't run.
The `SpecRunner` template seems to be generated correctly, but `grunt-template-jasmine-istanbul/reporter.js` is not being copied into the `.grunt/grunt-contrib-jasmine` directory.

This commit modifies the exports.process method of `template.js` in order to use the original path when copying `reporter.js`.