Version log DEBkiss package for BYOM

Version logging starts with 2.0 (earlier version have not been logged).

Version 2.0 (28 April 2017)

- Modified package so it runs with BYOM 4.0.

Version 2.1 (2 June 2020)

- I made a number of changes to make the calculations more efficient. Most importantly, the structure glo is now passed on to derivatives as an input rather than a global, and using read_scen in derivatives rather than make_scen to read time-varying exposure scenarios.
- Make use of the new plotting function plot_tktd for making more-readable plots for calibration.
- Small changes to ensure compatability with BYOM version 5.0.

Version 2.2 (28 September 2020)

- Spotted an error in the calculations for preventing shrinking on physical length on starvation. When running through the calculations with a rough time vector (as often in calibration), the maximum length before shrinking is poorly estimated. Simulations (with a generous time vector of 100 points or more) were not affected. In call_deri, a long time vector is now forced when glo.len == 2.
- Changed the equations for preventing shrinking: the same algorithm as used in openGUTS for finding maximum damage over time for IT. This should increase speed a bit.
- Changed the default settings for the ODE solver from [0 1] to [0 3].

Version 2.3 (28 November 2021)

- Adapted the package to work with BYOM 6.0.
- Added a folder with the DEBkiss model in compound parameters. For simple fitting, this is easier to work with.
- There is now an option to include a brood-pouch delay in the model. This shifts the model output in time. This is useful when the repro data represent neonate release from a brood pouch, rather than egg production.

Version 2.3a (30 November 2021)

- The profiling had an option setting in opt_prof that was modified. That did not produce an error; it just did not do what it was supposed to do. So the option 're_fit=1' was replaced be 'brkprof=2'.