ClusterPalette          An acceptable cluster color palette
EmbedSOM                Process the cells with SOM into a nice
                        embedding
ExpressionGradient      The ggplot2 scale gradient from
                        ExpressionPalette.
ExpressionPalette       Marker expression palette generator based off
                        ColorBrewer's RdYlBu, only better for plotting
                        of half-transparent cells
Initialize_PCA          Create a grid from first 2 PCA components
MapDataToCodes          Assign nearest node to each datapoint
NormalizeColor          Helper for computing colors for embedding plots
PlotData                Export a data frame for plotting with marker
                        intensities and density.
PlotDefault             Default plot
PlotEmbed               Helper function for plotting the embedding
PlotGG                  Wrap PlotData result in ggplot object.
PlotId                  Identity on whatever
SOM                     Build a self-organizing map
