Release 0.3.8

[ENH] Widget documentation
[ENH] Labels that overlap less
[ENH] More responsive crosshair
[ENH] An utility that can relate a part of settings (gui.connect_settings)
[FIX] Prevent invalid Savitzky-Golay settings
[FIX] Annotated data output from Spectra and Hyperspectra

Release 0.3.7

[FIX] Graph saving in widgets with multiple graphs
[FIX] Hyperspectra: moving integral region should not change outputs
[FIX] Hyperspectra: Fix coloring by a selected continuous variable

Release 0.3.6

• Hyperspectra: can now select limits
• Hyperspectra: better dynamic range
• Multifile: the user can select a specific reader
• Faster image reading

Release 0.3.5

Changes:
- EMSC allows (multiple) range selection
- Spectra and Hyperspectra use less memory (temporary workaround for
  an Orange bug)
- various Preprocess refactors