CORE-3963: switch to the latest version of clj-jargon
CORE-3969: added a configuration setting for users who need to retain access to files that are moved
CORE-3975: Fixed error message for invalid URLs.
Added docs for the new error code, ERR_INVALID_URL.
CORE-4021: Added the :skip-source-perms? flag to the move call in
Scruffian.
CORE-4035: /urlupload doesn't overwrite files. Fixed docs.
Removed code that was URL encoding the URLs that are passed down to the
curl wrapper for URL imports.
DE-809: Added code to check if a string is URL encoded. It's hokey and
error-prone, but better than the nothing we had before.
Merge branch 'dev' into 1.8

Conflicts:
	project.clj
	src/scruffian/actions.clj