Removed superfluous element wrapping

From the docs: "All element references in Angular are always wrapped with jQuery or jqLite; they are never raw DOM references."
Replaced $.parents() with getParentNodeByTagName function
Replaced $.parseJSON with native JSON.parse
Replaced advanced selector with angular.forEach loop
Replaced meta tag selectors with getMetaTagByName function
Updated specs to work without jQuery
Merge pull request #69 from intelekshual/no-jquery

Removed jQuery dependency