quickly corrected the previous refactoring of features2d/xfeatures2d

quickly corrected the previous refactoring of features2d/xfeatures2d: moved from set(SOME_PROP, val) to setSomeProp(val)

Refactored features2d & xfeatures2d

datasets module: PR for adding benchmarks and renaming module from datasetstools

Registration sample: adapt to xfeatures2d

Fix documentation title in TOF and some typos

cvv fix docs

Enabled java wrappers for bioinspired/retina module

Added Custom Calibration Pattern Module.

make opencv_cudaarithm dependency for xfeatures2d optional

Integrate cvv module: Interactive Visual Debugging of Computer Vision applications

datasets loading module: continue

Inpainting

Integration of SEEDS superpixel algorithm to opencv_contrib

fix mismatched delete[] calls in line_descriptor.cpp