PyJibe 0.9.0

• feat: allow users to enter missing metadata during loading
  of data files (#5)
• fix: automatically append .h5 suffix when rating datasets
• enh: add busy cursor where applicable
• ref: directory for importing training datasets for rating changed
  (but I think this currently affects nobody)
• setup: dump appdirs dependency (moved to QSettings)
• setup: bump afmformats from 0.12.5 to 0.13.3 (mostly #5 and speed)
• setup: bump nanite from 1.7.3 to 1.7.4 (mostly #5)
• tests: increase coverage