Build directory added to .gitignore
Foreground detection disabled in detector
Timing hooks placed for frame preparation final clustering
FG-detection merged onto timing branch
Print format for timing changed
Final changes for timing hooks
.gitignore fix
Initial CMake configuration added for CUDA support
Changes in source code organization:
	- Current detector implementation moved from src/libopentld/tld to a new directory `detector` under same path
	- Path changes reflected in CMakeLists.txt as necessary
Design changes in the detector component:
	- Interfaces defined for detector cascade and its filters (variance, ensemble and template matching)
		* Current detector cascade implementation are grouped together to provide implementation those interfaces
		* Another implementations can be added with some extra efforts
		* Current design not good at all. There are fundamental fallacies in terms of encapsulation, polymorphism and decoupling. It should be reviewed and altered.
	- Current detector implementation moved under directory `src/libopentld/tld/detector/`
Modifications to the application for CUDA integration
Initial commit for variance filter implementation in CUDA
Common CUDA headers grouped in to a single header file with an error check macro
NPP staging functions from OpenCV source tree integrated. (Integral image computation)
Variance filtering implemented in CUDA.
Initial implementation for ensemble classification in CUDA
Ensemble classifier implementation completed
Ensemble classifier integrated into classification pipeline
Merge branch 'cuda'