Returning a file extension in lowercase letters
Merge branch 'devel' of https://github.com/NPSVisionLab/CVAC into devel
Merge branch 'devel' of https://github.com/NPSVisionLab/CVAC into devel
Draft of RunsetIterator: RunSetIterator, RunSetWrapper, and MediaConverter

 - Usage example:
     RunSetWrapper test(&_runset,_mediaRootPath,NULL);
     test.showList();

     cvac::Constraints tConst;
     tConst.mineTypes.push_back("tif");
     tConst.mineTypes.push_back("png");
     RunSetIterator it(test,tConst);
     it.showList();
Debug BoW: adding a routine for handling exceptional cases of  one-class problem
Merge branch 'devel' of https://github.com/NPSVisionLab/CVAC into devel
On BoW,

- adding "key=value" approach for reading and writing a log file
- checking OpenCV version
- handling one-class problem

On FileUtils,
- obtaining file extension in lower-case only
For doing consistent "pull request", new implementations related to runsetIterator (or Wrapper) are removed temporarily.
New Trained Data for BoW including openCV version
Merge pull request #57 from lekomin/devel

OpenCV version check etc.