caffe/vision_layers.hpp is gone. also fix some warnings.

added thinning sample
added thinning tests

- added area under "lost track ratio" curve statistics
- added "lost track ratio" curve plot
- minor fixes

- used C++ to handle resources and output
- simplified and refactored the code
- changed statistic calculation (precision, recall, etc)
- used CommandLineParser -> CL interface has changed

added error msg for samples

also fix some minor doxygen issues