CHANGES IN VERSION 1.0.9
------------------------
    o changes to xgx_check_data() because some errors are new with regards to checking for negative values or NAs in the dataset

CHANGES IN VERSION 1.0.8
------------------------
    o theoph.Rmd vignette, for data_pk, keep only rows where TIME>0.  This fixed an 
      error in the vignette that was introduced with the March 5, 2020 ggplot2 update

CHANGES IN VERSION 1.0.7
------------------------
    o adding xgx_scale_y_percentchangelog10
    o adding xgx_stat_pi and xgx_geom_pi
    o adding xgx_minor_breaks_log10

CHANGES IN VERSION 1.0.6
-------------------------
    o updating sad_pkpd vignette to show BLOQ data in red
    o minor change to xgx_check_data() text output
    o updating xgx_scale_x_reverselog() and xgx_scale_y_reverselog() to more easily control the labels and to allow user to set accuracy
    o xgx_breaks_time() - allow user to set target number of breaks xgx_scale_x_time_units()

CHANGES IN VERSION 1.0.5
-------------------------
    o fixed bug in xgx_theme_set() to make sure it calls xgx_theme() instead of theme_bw()
    o fixed bug in xgx_stat_ci() which changed default geom properties globally by mistake

CHANGES IN VERSION 1.0.4
-------------------------
    o fixed bug in xgx_geom_ci because it wasn't properly passing parameters to xgx_stat_ci
    o fixed bug in theoph.Rmd vignette to properly calculate the NOMTIME.
    o update theoph.Rmd and sad_pkpd.Rmd vignette to use TIME and NOMTIME both for confidence interval plots that overlay data

CHANGES IN VERSION 1.0.3
-------------------------
    o datasets are now visible to R-3.6 but this may break functionality for R-3.4
    o therefore, we now require R >= 3.5 for using this package.
    o user can still use xgxr-1.0.2 for R-3.4
    
CHANGES IN VERSION 1.0.0, 1.0.1, and 1.0.2
-------------------------
    o fixing to get in line with CRAN policies (e.g. example code cannot save files in the user's directory)

CHANGES IN VERSION 0.0.1
-------------------------
    o initial release
