lot's of changes; nonfree & photo modules added; SIFT & SURF -> nonfree module; Inpainting -> photo; refactored features2d (ORB is still failing tests), optimized brute-force matcher and made it non-template.

 [~] Automatically tracked dependencies between modules
 [+] Support for optional module dependencies
 [+] Options to choose modules to build
 [~] Removed hardcoded modules lists from OpenCVConfig.cmake, opencv.pc and OpenCV.mk
 [+] Added COMPONENTS support for FIND_PACKAGE(OpenCV)
 [~] haartraining and traincascade are moved outside of modules folder since they aren't the modules

removed trailing backspaces, reduced number of warnings (under MSVC2010 x64) for size_t to int conversion, added handling of samples launch without parameters (should not have abnormal termination if there was no paramaters supplied)

HAVE_CONFIG_H -> HAVE_CVCONFIG_H

update help corresponding single format and update some samples through using CommandLineParser class

command line parser added. Leonid Beynenson is original contributor of the class. Class will be used in samples for convenient (and unified) work with command arguments.

[~] fixed warning in featuers2d under windows (can't generate assignment operator)

improved tree_engine.cpp sample (added train file data specification; print sorted variable importance table)