Add a description method to all Syncables, replacing that passed into SyncRoot.add.
Add a description method to all Syncables, replacing that passed into SyncRoot.add.

- Also add a :synctype to SyncUpDown::Item so sync/status commands can be more helpful/descriptive.

tadpol/MuranoCLI,exosite/MrMurano,exosite/MrMurano,tadpol/MuranoCLI,tadpol/MuranoCLI