Merge pull request #1872 from mazumdarparijat/KMeans_notebook

added PCA+KMeans in KMeans notebook
fix install of r_static/modular interfaces when DESTDIR is set
add another missing DESTDIR
ssk renamed to SubsequenceStringKernel for naming consistency
Merge pull request #1879 from lambday/develop

ssk renamed to SubsequenceStringKernel for naming consistency
minor corrections in comments
proper error messages
some modifications to  make this at least compile.
added mkl grid search example (which doesnt work)
Merge pull request #1885 from karlnapf/develop

modelselection_grid_search_mkl
changed license to bsd 2clause
added shogun toolbox
some more comments by viktor
Merge pull request #1874 from mazumdarparijat/pca

PCA bug fixed
Merge pull request #1890 from karlnapf/develop

changed CQuadraticTimeMMD license to bsd 2clause
fix mistake in ssk kernel example
fix uninitialized memory bug in TParameter::copy
Merge pull request #1892 from lambday/develop

fix uninitialized memory in TParameter::copy and added unit-test
Merge pull request #1893 from mazumdarparijat/pca

LARS bug fixed
mention memory and crash in the latest fixes