ADD Helpers to jasmine
jasmine-node expects and array of `specFolders`

When setting `projectRoot` and `specNameMatcher` in grunt config jasmine node expects and array.

See:
https://github.com/mhevery/jasmine-node/blob/master/lib/jasmine-node/spec-collection.js#L19
https://github.com/mhevery/jasmine-node/blob/master/lib/jasmine-node/index.js#L71
allow use of projectRoot or specFolders
Merge pull request #14 from patrickarlt/master

jasmine_node expects "specFolders" not "specFolder", support for jasmine-node 1.4+
Merge pull request #11 from jmendiara/helpers

ADD Helpers to jasmine
Added Gruntfile.js by @ranzwertig. Deleted old grunt.js file. Updated package.json by @ranzwertig. Added coffee support to the task. Other small fixes from all the pull requests, thanks everyone
Version bump for grunt 0.4.1+ and jasmine_node 1.4.0+ compatibility, coffee support.
Add projectRoot option

execute tests in all folders specified by projectRoot, SpecFolders and in the grunt src (which allows globbs)