Added an implementation of manifold sculpting DR method (see http://axon.cs.byu.edu/papers/gashler2011smc.pdf);
Added a method in tapkee library for converting FeatureCallback into a DenseMatrix (it was used previously a
few times); refactored a little; added all the stuff needed for the new method to be 'visible' from outside the tapkee.
Fixed issues and refactored according to the comments in PR (https://github.com/shogun-toolbox/shogun/pull/1086).
Added a wrapper for a manifold sculpting DR method implemented in tapkee; added a modular wrapper for the wrapper:); fixed some bugs in the algorithm itself.
Merge pull request #1105 from vladislav-horbatiuk/vgorbati-develop

Added full implementation of manifold sculpting DR method and a smoke test for it.