Natal

• Now R version 4.0 compatible
• Part 1 Clipping detection expanded: If any value in block more than 150 percent
  dynamic range then ignore entire block.
• Part 2 report now able to handle changing variable count due to missing data
• Part 2 L5M5 better able to handle small qwindow intervals
• Part 3 HDCZA algorithm expanded to be able to detect daysleepers
• Part 3 various improvements to qc plots.
• Part 5 now also stores full and cleaned output
• Part 5 now better handles missing days in part 4 output.
• Part 5 behavioral class SIB removed from daytime
• Part 5 time series export more user-friendly.
• Part 5 function code split up in 7 new functions.
• Part 4 + 5 argument data_cleaning_file added.
• Part 4 + 5 output variable names improved and documented in vignette
• Numunpack function moved back to c++
• Various updates to visualreport (plot5 function)
• External function embedding feature added
• We now consistently refer to ID (not id) and calendar_date, spelling was
  inconsistent.
• Vignette now has documentation on sleep and time-use analysis.