Opens project's S3 folder in browser.
Arguments
- path
- (optional) Path inside the S3 folder to open. Defaults to the root level (path = "") of the project's S3 folder. 
- root
- S3 path of the project root. This serves as the reference point for all relative paths. When left as - NULL, the root is automatically derived from the- cloudfs.s3field of the project's DESCRIPTION file.