v0.19.0

• build
  • Adds Dockerfile. Updates Makefile and README.
  • make maintainer tag same as dockerhub organization name
  • make sure to run tests for non-free contrib algorithms
  • update Appveyor build to use Go 1.12
• calib3d
  • add func InitUndistortRectifyMap (#405)
• cmd
  • correct formatting of code in example
• core
  • Added Bitwise Operations With Masks
  • update to OpenCV4.0.1
• dnn
  • add new backend and target types for NVIDIA and FPGA
  • Added blobFromImages in ROADMAP.md (#403)
  • Implement dnn methods for loading in-memory models.
• docker
  • update Dockerfile to use OpenCV 4.0.1
• docs
  • update ROADMAP from recent contributions
• examples
  • Fixing filename in caffe-classifier example
• imgproc
  • Add 'MinEnclosingCircle' function
  • added BoxPoints function and BorderIsolated const
  • Added Connected Components
  • Added the HoughLinesPointSet function.
  • Implement CLAHE to imgproc
• openvino
  • remove lib no longer included during non-FPGA installations
• test
  • Add len(kp) == 232 to TestMSER, seems this is necessary for MacOS for some reason.