2019-04-10 - popkin 1.2.0.9000

Renamed functions to fit tidyverse naming style:
- inbrDiag -> inbr_diag
- neff -> n_eff
- plotPopkin -> plot_popkin
- rescalePopkin -> rescale_popkin
- weightsSubpops -> weights_subpops
- Several argument names were also updated to be more descriptive (particularly in plot_popkin).
- Functions with old names remain for now as deprecated functions (to be removed in the future); only plotPopkin retains the older argument names.
inbr_diag now accepts lists of kinship matrices to transform (for easier plotting of multiple matrices).
plot_popkin now requires its non-NULL inputs to be proper kinship matrices.
Previously, the code used to somewhat allow for non-square matrices to be visualized, but this case had no guarantees to work.
The code is cleaner under the assumption of symmetric square matrices.
Added more input checks to functions, informative error messages.
Added functions: validate_kinship, mean_kinship

2019-04-24 - popkin 1.2.1.9000

plot_popkin bug fixes and enhancements!

plot_popkin now resets graphical parameters when done and after every panel as needed.
- Fixed a bug where panel margins were not reset per panel.
  In particular, after setting custom margins for one panel, but NULL (default) for subsequent panels, the original margins were not reset (instead, the last values were incorrectly propagated).
- The entire layout (all original par values) is now reset after plotting is complete.
- Updated documentation to reflect new behavior.
Can now have letters on single-panel plots as long as a single letter is passed to plot_popkin option panel_letters (default is A-Z, so the default remains to not show letters for a single panel).
Added leg_cex option to plot_popkin.

Third CRAN submission.
Added ORCIDs to authors.
Added back to popkin function the deprecated parameter names lociOnCols and memLim alongside the new names, to prevent breaking existing code (generate warnings).