Compute_GO_Enrichment: Plot dendrogram colored by sample definition
In AlexGa/GraftingScripts: Reproducible scripts for studying the graft formation

Does a hierarchical clustering of the data and draws a dendrogam with colored branches and leaved based on the sample definition.

1	Compute_GO_Enrichment(geneUniverse, selectedGeneIds, pvalueCutoff=0.05, ontology="BP")

`geneUniverse`	`vector` containing all gene ids of the whole dataset
`selectedGeneIds`	`vector` containing subset of gene ids to check if their GO terms are enriched
`pvalueCutoff`	numeric value defining the p-value cutoff for the adjusted p-values to call a GO term significantly enriched (default: 0.05)
`ontology`	character string defining the GO ontology and must be one of "BP", "CC", or "MF"