GeomVerify/GeomVerify.cpp
* Parametrized proximity and similarity thresholds.
* Setting direct index level using loaded value.

VocabBuildDB/VocabBuildDB.cpp
* Parametrized direct index levels up.

VocabLib/include/DirectIndex.hpp
VocabLib/src/DirectIndex.cpp
* Implemented setter for level attribute.

VocabLib/include/VocabTree.h
* Added to the base class methods for accessing direct index level and
tree depth.
* Setting direct index level through accessor method.