Fix a type instability issue in tsne
Fixes PCA (issue #13) and adds necessary tests
Fixed type instability in PCA
Fixed function comment in PCA
Merge pull request #14 from cbecker/master

Fixes PCA (issue #13) and adds necessary tests
Fixed and extended PCA docs
Fixed and extended PCA docs
Merged fixes to PCA docs
Merge pull request #16 from cbecker/master

Improved PCA docs
Deprecated NMF, ICA and T-SNE. Improved docs as proposed by #10
Merge pull request #17 from cbecker/master

Docs: deprecated NMF, improved docs as proposed in #10