topic_distribution() plotter gets label the less simple way in order to
remove unwanted metadata from becoming potential labels
Added a script that does PCA and plots it with 2 components.
pca plots in 3d as well.
changed name of self.metatada variable to metadatamatrix becuase of
confusion with method in Labelling class.
added script to make prepare data for parallel coordinates plot in d3
Merge branch 'master' of https://github.com/sperez8/microbPLSA.git