Merge pull request #39 from cam156/auto_fix

Added positioning and css so autocomplete works correctly
Move permissions into it's own js file
Remove robots.txt
Prevent scroll to top of the page on tab change
Move js tab functions into its own file
Moved related functions into sufia/tabs.js and sufia/permissions.js
Removed dead code
Move UMG description into it's own partial for easy overriding
Merge pull request #38 from cam156/user_fix

Remove behavior that broke class
We don't need to have a file for this test
Modularize file_content_datastream so that extract_metadata can be overridden
Update to latest hydra-head
Bump to version 0.0.4
Provide the directory because the permission partial is used by the batch controller and the generic_file controller
bump version to 0.0.5
Explaining ffmpeg install for Ubuntu
Fix typo
newest rspec-rails breaks our routing test
Refactor so that #show can examine the asset before using #send_content
Authorize the single use links