VocabBuildDB/VocabBuildDB.cpp
* Changed usage text to explain better input and output parameters.
* Fixed to setup weighting scheme in case tfidf wasn't chosen.
VocabLearn/VocabLearn.cpp
* Changed i/o program usage parameters so that it is more clear which are input and which ones output.
VocabMatch/VocabMatch.cpp
* Changed i/o program usage parameters so that it is more clear which are input and which ones output.
README.md

* Documented program components and added a stub for further documentation.