Add automatic threshold in canny edge detector
Merge branch 'master-itseez'
Merge branch 'master-itseez'
Merge remote-tracking branch 'itseez/master'
Merge remote-tracking branch 'itseez/master'
Merge remote-tracking branch 'itseez/master'
Merge remote-tracking branch 'itseez/master'
Merge remote-tracking branch 'itseez/master'
Merge remote-tracking branch 'itseez/master'
Merge remote-tracking branch 'itseez/master'

Conflicts:
	modules/imgproc/src/canny.cpp
Merge remote-tracking branch 'itseez/master'

Conflicts:
	modules/imgproc/src/canny.cpp
Merge remote-tracking branch 'itseez/master'