Added the ability to delete files
Exposed can_delete to the frontend if and only if the user has opted out of local storage history.
Added the can_delete variable in all cases, will have the value 'check' if the opt out cookie is not found and therefore should be checked using JS
Merge pull request #129 from MediaCrush/delete_files

Delete files
Update README.md, closes #132
Update image.py
Fix source code link in demo page
Made nginx serve md files as text/plain
Added the ability to delete files from mcmanage
Made naming consistent with the rest of the commands
Documented all the currently implemented API
Fixed formatting
Moved API.md to docs/
Added and documented /api/<hash>/delete
Merged with origin