Updated to support Grunt 0.4.0rc4

This pull request supports Grunt 0.4.0rc4. All tests pass.

1. Changed grunt.utils to grunt.util
  * Grunt's utils was renamed to util as per https://github.com/gruntjs/grunt/commit/c3931bd807d81f25ca8f431b2e543f90ee610cc2#lib/grunt

2. Sent the existing template object context wrapped in a new object with key data
  * Grunt updated their template.process method
https://github.com/gruntjs/grunt/commit/451c75fd79d5e68c3e4d72eeeafbc79632b0bcf6#lib/grunt

Also to note it appears grunt.file.expand now includes folders. I updated the tests to only include files.