rose cli: rationalise verbosity defaults

[benfitzpatrick]

We need to rationalise the amount of output our commands give.

In particular:

• [ ] ~rose suite-run is overly chatty by default (e.g. notifying each app copy)~
  • [ ] ~tidy up and consolidate the output information~
  • [ ] ~report uncommitted changes if version control available~
  • [ ] ~make the output information visible in the gui by default~
  • [ ] ~add a timestamped starting or initialised at to the log~
• [ ] rose task-run is overly chatty by default (most run it with -v anyway)
• [ ] ~rose rug-brief-tour could provide details of the directories and files it is installing~
• [ ] ~rose suite-clean probably provides too much detail about what it is doing by default~

[oliver-sanders]

Note: Of these four commands only rose task-run remains.