Removed no longer needed #TODO comment.
Added staticmechods from_index and from_path to Snapshot class.
Added linkdest keyword argument to rsyncWrapper.sync_to().
Added Cycle's ability to build it's own list of existing Snapshots.
Added support for link-dest in the class Cycle.
Cycle.get_linkdest() returns Snapshot instead of string.

This allows the calling function to lock the Snapshot while syncing.
Added the method archive_from to the class Cycle.