Common/include/DynamicMat.hpp
* Declared method DynamicMat::release for releasing loaded matrices.
* Changed accesibility of some methods and attributes.
* Changed type of data structure holding loaded matrices cache from a
std::map to a std::vector.

Common/src/DynamicMat.cpp
* Deleted commented lines.
* Re-implemented DynamicMat::row due to type change.
* Implementented method DynamicMat::release.

Common/tests/DynamicMat_test.cpp
* Refactored tests to test DynamicMat::empty method.
* Refactored RowExtraction test, removed output status message,
decreased number of used keypoint files from 5008 to 10, and logged row
extraction times wihtout output status message.