Added tests for downloading files

A few notes:
1. Downloads are done through direct requests.  This is due to the difficulty of downloading a file to the correct place
2. Modifiying a file will just change the file to a random 10 character string.
3. The page is reloaded in between uploads.  This is due to a current caching bug that is in the process of being looked into and will be updated once it is fixed.