backup now:
- sorts output for easier processing by diff
- exports only non-default fields
- removes strong typing in yaml
- fixes removal of results/features when --clean
- basic merge if meta object already exists
- only backfill on new meas or meas where method changed
make sure all fields have defaults (for detection of changes by Backup)
Merge pull request #590 from demaagdk/develop

Improved backup script