(cherry picked from commit 341e7b3b)

(cherry picked from commit bba8c0be)

in documentation exact path is images/CameraCalibration/VID5

see also PR #5393

literalinclude

literalinclude, dropped :lines:

Seems correct to me and builds fine

initialize TIMES variable with some default value (10)

Conflicts:
	samples/cpp/tutorial_code/ImgTrans/HoughCircle_Demo.cpp

content and renamed to a more sensible name. Also fixed a wrong link in the
actual display_image tutorial.

Also fixed some typos and code alignment
Also adapted tutorial CPP samples
Fixed some identation problems

If we have perfect matches (min_dist == 0.0), then strict comparison
fails. Making it non-strict results in treating perfect matches as
good.

These codes should be included into regular builds.

Changes made for OpenCV 2.4.2 compatibility

error in the tutorial Similarity check (PNSR and SSIM) on the GPU