Fixed minimal version of Eigen3 that supports sparse matrices
Merge branch 'release/3.0.0'

Conflicts:
	src/shogun/lib/tapkee/tapkee_defines.hpp
Merge branch 'release/3.1.0'
Merge branch 'release/3.1.1'
Merge branch 'master' of https://github.com/shogun-toolbox/shogun
seed the rng to the heisenbug and make the kernel more diagonally
dominant to make it p.d.
link quickstart
Merge branch 'release/3.2.0'
Merge branch 'master' of github.com:shogun-toolbox/shogun
add empty news boiler plate
added PCA+KMeans in KMeans notebook
minor changes in PCA in KMeans notebook
apply_to_feature_matrix method fixed in PCA
PCA unit test added
PCA code changes fixed
fix install of r_static/modular interfaces when DESTDIR is set
add another missing DESTDIR
ssk renamed to SubsequenceStringKernel for naming consistency
PCA in-place
updating revision of data submodule