Remove onbeforeunload straggler.
Add drag-drop file uploads to the admin interface.
mkdir_p to creates images/
Update CHANGELOG about drag-drop uploading.
mkdir_p the source directory.
Third time's a charm.
Add a note about drag-drop to the interface.
Caveat to the README about images/ for drag-and-drop.
Make the image upload path configurable.

This also constructs the entire path client-side to be used by the
application.
Fix data-attachify placement on new_draft.
Abort file upload if slug needed.
Slightly better drag-and-drop path documentation.
ABSOLUTELY RELATIVE.
Merge branch 'master' into file-uploads

Conflicts:
	statics/templates/admin/layout.liquid
Fix broken Delete button placement.
Mention image path customisation in CHANGELOG.
Merge pull request #18 from aprescott/file-uploads

Support image uploads to a default directory from the admin interface