[ru] chapter 7: Extend/improve "Diffing Binary Files" section
[ru] chapter 7: Translate figures.
[ru] chapter 3: Translate some figures.
[ru] chapter 8: Incorporate changes from 90c92ceb9

"Fixed the command for git svn clone, removed erroneous hyphen"
Merge pull request #497 from GArik/RU

[ru] Translate some more figures and update "Diffing Binary Files" section