keep 95% of variance in PCs, cluster and use cluster by ensemble

Look at SB characteristics and uptake of ART/HIV testing - which in turn reduce HIV incidence

Auto-saving for jeffrey.post on branch master from commit a5bc2520

See merge request !1

szcore (True or False in PCA)
Clustering using kmeans or hierarchical
Geopolitical data
indicator_analysis to see indicators in relation to PC-1 and HIV incidence

See code for more details.