Amend the LIGER report: (1) implement the hexogonal tSNE plots into the LIGER report, (2) get the riverplot into the LIGER report, (3) in the LIGER report, in the Clustering section, show bar plots with percentage of each cluster that comes from each group variable.

[NathanSkene]

[MahdiMoradiMarjaneh]

Sankey plot and proportional barplot features are added to the integrate report 0bc0717