* 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
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