Added unwrapping of the jquery encapsulated $document variable

See
http://www.bennadel.com/blog/2630-accessing-document-properties-in-angularjs.htm
Reverted changes as they have already been pull requested
Handling for explicit usage of cookie fallback

If the user explicitely set the storage type to cookie also the
getFromLlocalStorage and addToLocalStorage method should use the cookie
fallback.
Merge branch 'master' of https://github.com/FeelgoodDE/angular-local-storage
Reverted changes...
Merge pull request #116 from FeelgoodDE/master

Handling for explicit usage of cookie fallback