Common/src/DynamicMat.cpp
* Doing calls over cached elements using
member access operator for pointers instead of the dereference operator.

VocabLib/include/VocabTree.h
* Calling method for fetching map parameter using its full name considering the namespace.
* Removed unnecessary parenthesis on instantiation of templated class numeric_limits.
* Fixed memory leak problems: deleting children pointer and node pointer on class destructor, deleting indices pointer at the end of build method.