autoplot heatmap-genes - parameter passing

[JasonWReeves]

currently autoplot does not pass ... arguments to pheatmap in the protoheatmap section.
It would be advantageous for users to update the heatmap at least to include clustering changes (linkage & distance row/column), but also have more general flexibility based on pheatmap itself. Determine if ... should be passed directly to pheatmap in protoheatmap or if additional explicit functions should be added.