project_individuals: Project individuals into PC space
In rscherrer/bop:

This projects individual specimens into the PC space defined by species-averages.

1 2	project_individuals(inpath, pca, varNames = c("VS.v", "S.v", "M.v", "L.v"), wholeBird = T)

`inpath`	A string. The path to the folder where to find the input data file. Note: the input data file is named "specs_indiv.csv".
`pca`	A `prcomp` object.
`varNames`	A vector of strings. The names of the dependent variables in the input data frame.
`wholeBird`	Whether the current analysis is per species (T) or per patch (F). If TRUE, the individual data are rearranged by patch prior to PCA, otherwise not.