Implementing alternative workaround to support loading Grunt plugins installed in grunt-drupal-tasks/node_modules rather than the original working dir. This approach allows loading plugins with loadNpmTasks() instead of the current hack with loadTasks().
Minor clean up of default build tasks.
Update example project.make to Drupal 7.33
Changing default PHPCS validation level to 'full' from 'summary'.
Updating documentation to remove '--save-dev' flag from npm install instructions.
Updating version in package.json.
Copy default files over before cleaning sites directory.

- Fixes issue #45
Add additional Features file patterns to exclude
Split out defaults for use across multiple tasks