Added to online stories, the ability for a user to click a "I'm Feeling Lucky" button to get a random story for viewing. In the process I have cleaned up some of the code in onlineStoriesActivity.
Manual merge of removal of unused variables in FileHelper.
Merge branch 'master' of https://github.com/CMPUT301F13T08/CMPUT301F13T08

Conflicts:
	Team08StoryApp/src/com/team08storyapp/FileHelper.java