Enabled/fixed streaming_onlineliblinear example:
* Fixed streaming header includes (have been moved to streaming subfolders).
* Fixed dynamic_cast from CStreamingDenseFeatures<float64_t> to CStreamingDenseFeatures<float32_t>.
* Fixed memory leak
* Added streaming_onlineliblinear to target list in examples Makefile

In OnlineLinearMachine:
* Fixed small memory leak (did not free DynArray).
base class and serial implementation of computation engine added
Merge pull request #1180 from lambday/feature/log_determinant

Removed setter for linear operator/vector for CDenseExactLogJob, computation engine added
Merge pull request #1181 from tklein23/develop

Enabled/fixed streaming_onlineliblinear example
Merge pull request #1182 from lambday/feature/log_determinant

added COperatorFunction base class, one implementation CDenseMatrixExactLog, and a unit-test
minor documentation fixes in log-det framework