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math/R-pcaPP: import R-pcaPP-2.0.4

Provides functions for robust PCA by projection pursuit. The methods
are described in Croux et al. (2006) <doi:10.2139/ssrn.968376>, Croux
et al. (2013) <doi:10.1080/00401706.2012.727746>, Todorov and
Filzmoser (2013) <doi:10.1007/978-3-642-33042-1_31>.