Fix getting message on error

JavaScript error thrown has no property 'Description', should be
'message'.

See
https://developer.mozilla.org/en/docs/JavaScript/Reference/Global_Object
s/Error
Merge pull request #6 from revolunet/master

auto cookies fallback
Cookies work as fallback
Merged cookies fix with errors fix
Update localStorageModule.js

Configurable notifications of add and remove items.
Update localStorageModule.js

Change notifications to be consistent with original code, lowercase.
Merge pull request #10 from sbosell/master

Notification broadcasts on setItem and removeItem
Adding set to API for both localStorage and cookie
cookies made persistent
Merge pull request #13 from defectus/master

Cookies made peristent
Merge pull request #12 from Sgoettschkes/api_set

[WIP] Changing API from add to set
fixed cookie error
Merge pull request #14 from geun/master

fix cookie error
Allow storage of falsey values
Merge pull request #15 from staxmanade/master

Allow storing falsey values
Convert undefined values to null
Detecting if the value being stored is an object. using angular's fronJson and toJson methods to parse it.

This saves the user from having to call the stringyfyJson() and parseJson() before getting and setting to the local storage. Those functions can also be now ported over to use angular.toJson and angular.fromJson(). That change is not included in this commit.
Merge pull request #16 from nmehta6/master

detecting if Json needs to be parsed or stringified as part of addToLocalStorage() and getFromLocalStorage()
Remove unnecessary JSON methods
Changed constant to value

Changing angularLocalStorage.constant('prefix', 'ls') to angularLocalStorage.value('prefix', 'ls'). Now, this prefix can be overwritten by the consuming app.