Changed BeautifulSoup import to work with bs4 on Ubuntu
Changed download code to skip a video if the .mp4 OR .wmv exists already
Changed login code to handle either the presence or absence of
the interstitial page (it doesn't show up for me)
Added easy-install commands and fixed a link title in the Readme
Minor edits to README
Merge pull request #5 from LukeAllen/master

Updated