Changed lost images to existing one. #trivial

[tataevr]

New images taken from http://texturegroup.org/docs/automatic-layout-containers.html.

[CLAassistant]

All committers have signed the CLA.

[maicki]

@tataevr Hey - if I go to the page it seems like the images are there. Do you not see this images if you go to http://texturegroup.org/docs/automatic-layout-containers.html?

[tataevr]

@maicki yeah, i can see them. But when you look to github markdown - they are lost.
Why i'm reading tutorial at github - because of markdown, you can perfectly see all markdown element (which you can't see at http://texturegroup.org/docs/automatic-layout-containers.html).

So, that's why i suggest to update images at github markdown document.

[nguyenhuy]

@tataevr I see. Would be great if we can fix other links throughout as well. Let's land this diff as is for now.

Thank for, btw. First diff and (hopefully) more to come!