* Make OpenBR compatible with OpenCV 4.X (tested with 4.5.1). There is a loss in functionality with this port. See TODO.md for outstanding issues
* Add ForestInductionTransform back into forest.cpp
* Add boost back in to OpenBR. This was difficult because OpenCV 4 dropped the C persistence layer, which all of the boost classes use. The new 3rdparty/opencv2-compat directory adds the C persistence layer back in, along with the old OpenCV ML classes that were removed for 4.X
* Add boosted forest plugin back in
* Freeing memory only leads to terrible consequences! Both of these cases caused double frees when the pointers were freed. This solution definitely has a memory leak during training, but it does work
* Add InputOutputArray operator
* Properly print matrices with newlines
* Bug fixes
* opencv still defines these
* updated module dependencies
* bump eigen to fix compile error
* opencv ios lib location has changed
* sift now part of features2d
Co-authored-by: Jordan Cheney <jordan@rankone.io>
Co-authored-by: Scott Klum <scott@rankone.io>
Co-authored-by: Josh Klontz <josh@rankone.io>
