* master: (468 commits)
  added suppression for TBB valgrind issue
  update CUDA architecture flags initialization
  increase minimal supported CUDA toolkit to 6.5
  check the CPU flag correctly
  opencv_visualization: check cmdline args
  provide better error messages
  stop search of markers in Exif reader to prevent infinite loop
  Fix calibration fail on python with CALIB_THIN_PRISM_MODEL flag
  clarify CUDA arithm operations usage with mask
  fixed empty image condition in resize
  fixed memory leak in flann tests
  fisheye: add CALIB_FIX_PRINCIPAL_POINT
  get/put: more type-safety and code unification using templates
  py_tutorials: fix cv2.findContours return val
  imgproc: speed up threshold of 64F version using NEON and SSE   * use NEON under aarch64 only   * check 64F version correctly
  bigdata: add test, resolve split/merge issue
  Improved Carotene library linear resize evaluation precision and enabled it as HAL implementation.
  persistence: fixing crash with space-only values
  Removed unnecessary check for Android API level and unused flags.
  Fix for median blur of 2-channel images
  ...