Merge pull request #1 from bewt85/master

Minor typo in README
Merge pull request #2 from bewt85/master

Added Argparse support and support for firefox
Merge pull request #3 from bewt85/master

Change README to reflect last commit
broken: add function to return only stories modified since <date>.  Doesn't work if only one story is returned
fix bug in StoryRender where only one Story is passed
Merge branch 'modified'
add option to filter by Story creation / modification date; fixed bug when only one story is passed to renderer