dot product
dot product iter2
Fix memory leak in LibSVMFile.cpp -- ./tests/unit/unit-SGSparseMatrix
Fix memory leak in KernelPCA constructor.
Example of CustomKernel with IndexFeatures in libshogun.
fix function name.
Add IndexFeature to Python interface.
Remove the print function.
Add new example for index feature in custom kernel.
Proper naming of temp files put to /tmp to allow easy cleanup of failed tests.
fixed legends and plots in PCA notebook.
Merge pull request #2170 from tklein23/naming_of_serialization_temp_files

Proper naming of temp files in /tmp
Merge pull request #2173 from kislayabhi/develop

fixed legends and plots in PCA notebook.
dot product iter3
Modify example output, and output submatrix in python example.
added more regularization methods to NeuralNetwork
reworked neuralnets_digits notebook
Merge pull request #2125 from sunil1337/eigen3_dot_product

dot product (GPU+CPU)
Modify the shogun-data.
Fixed copy-pastos.