minor build system changes (now cuda code in opencv_core is compiled using CUDA_ARCH* cmake variables)

 [~] 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

Refactored performance tests. TEST_CYCLE macro is renamed to TEST_CYCLE_N; SIMPLE_TEST_CYCLE is renamed to TEST_CYCLE; from now 100 iterations are default for performance tests

Fixed build for x64 with sse2 disabled; several improvements in performance testing framework; enabled SANITY_CHECK() for performance tests

Fixed small problem in chart.py.

Performance testing: added option to get list of all values for CV_ENUM; added perf test for cv::Sobel

Added possibility to configure TBB behavior in Perf tests --- now we can set the number of TBB threads in the perf tests either as console parameter perf_tbb_nthreads or 
in a test itself using the method declare.tbb_threads(n).