Common/FunctionUtils.cpp
* In function printDescriptors, separated single matrix elements by a
comma.
* In method DynamicMat::row, implemented a buffer of matrices and
returned a new header pointing to the requested row.

Common/FunctionUtils.hpp
* In class DynamicMat, added to new attributes for holding a buffer of
matrices and FIFO queue to keep track of the addition order of matrices.

Common/tests/.gitignore
* Ignored DynamicMat tests executable.

Common/tests/DynamicMat_test.cpp
* Re-designed tests to initialize DynamicMat from a set of existent
descriptors saved in files.
* Refactored row extraction test to verify all the descriptos in
DynamicMat are correct.

VocabLib/include/VocabTree.h
* In VocabTreeParams struct set max number of iterations to 1.
* In method computeNodeStatistics of template class VocabTree removed
commented code since this method is indeed not necessary and changed for
dummy code to initialize centroid as zero to meet the asserts in the
load_tree method.
* Added some output status messages controlled by verbose compilation
directive.

VocabLib/tests/VocabTree_test.cpp
* Uncommented tests and changed data initialization for loading some
real data.