Changes in version 1.7.2:
+ differential testing allowed, even when 1 gene only is provided

Changes in version 1.7.1:
+ when removing nuisance covariates, the previous linear model was replaced with a linear mixed effect model with: i) fixed effects for the nuisance covariates, and ii) random effects for the samples. This properly accounts for the correlation structure of cells belonging to the same sample.

Changes in version 1.4.1:
+ fixed bug in log2_FC.R;
+ added rmarkdown as `Suggests` in DESCRIPTION.

Changes in version 1.0.4:
+ major speed-up in log2-FC function.

Changes in version 1.0.3:
+ FC and log2-FC calculation added (via 'log2_FC' function);
+ 'top_results' function edited to sort results by p-value and log2-FC.

Changes in version 1.0.1:
+ substantial speed-up in `distinct_test` (~7 times faster);
+ parallel computing introduced;
+ modelling of covariates introduced, via a design matrix;
+ two new functions to visualize results: `plot_cdfs` and `plot_densities`.

Changes in version 1.0.0:
+ Submitted to Bioconductor