rosie delete: add test battery.

Use rose.fs_util to do mkdirs, delete, etc.
Simplify prompting logic.
Remove previously wrongly added test-battery generated files.
Allow rosie go to look at other users' roses dirs.
Merge branch 'master' into t-rosie-delete
Added --metadata-off option to config edit.
--metadata-off changed to --no-metadata
Statusbar now displays summary OK/Errors.
rosie.ws: basic `all_revs` test battery
Merge pull request #811 from arjclark/rose-edit-ok-status

rose edit: everything OK rule checker statusbar message
Merge pull request #812 from matthewrmshin/t.rosie-ws.all_revs

rosie.ws: basic `all_revs` test battery
Merge branch 'master' into t-rosie-delete
Add index.html to redirect to doc/
Fix / and ~ issues.
Merge remote branch 'upstream/master' into rosie-other-roses
Updated statusbar message.
Fix ~ that gets added to URI
Merge pull request #808 from arjclark/rosie-other-roses

rosie go: allow looking at other users' roses dirs.
Improve doc on built-in application selection

Add examples for `mode=fcm_make` and `mode=rose_prune`.
Raise exception on incorrect application mode.
Fix --no-metadata for previewed apps.
Merge branch 'master' into t-rosie-delete
Merge branch 'master' into rose-app-run-mode-err