Added new interactive kmm demo
Merge pull request #1105 from vladislav-horbatiuk/vgorbati-develop

Added full implementation of manifold sculpting DR method and a smoke test for it.
Merge pull request #1099 from goldbug/develop-kmm-example

Added new interactive kmm demo (issue #885)
Fixed insert in CombinedKernel/CombinedFeatures -- Added some unit tests
Merge pull request #1108 from van51/feature/fix_insert_bug

Fixed insertion in CombinedKernel/CombinedFeatures
Removed CFeatures::get_size() method (according to https://github.com/shogun-toolbox/shogun/issues/1102).