Gives more accurate error propagation, control of depth of recursion
and short circuit recursion where possible.
Most of the the heavy lifting is done in the "fs" package, making file
system implementations a bit simpler.
This commit contains some code originally by Klaus Post.
Fixes#316
This will allow setting up a remote with copy&paste of values to a headless machine. It will allow copy+pasting a token into the configuration.
This requires rclone to be on a machine with a proper browser. Custom client id and secrets are supported.
To test token generation, use `rclone auth "fs type"`.
