added constructors for LogDetEstimator
added constructors LogDetEstimator,unit tests for those and added get methods for private variables of LogDetEstimator
fixed typos in #1940
added docs to #1940, unneccesary data from unit tests
removed constructor for dense matrix
Merge pull request #1940 from sunil1337/develop

added constructors for LogDetEstimator
remove german umlaut
minor documentation fix in linear time mmd
added setters for streaming features in streaming mmd
remove default blocksize from streaming mmd
added sanity check in CStreamingMMD::stream_data_blocks
refactored streaming mmd and linear time mmd