String encoding now uses encodeByAddingPercentEscapes() instead of stringByAddingPercentEscapesUsingEncoding: because specific URLs (weather.gov) were not being encoded properly. Also cleaned up the prepareWithActivityItems: code so that it gets the actual NSURL activityItem instead of the last item.
Merge pull request #9 from simpleappgroup/master

Fix encoding issues with certain urls, verify that it uses the actual NSURL item, and updated the activity title.