[ru] fixed review comments for chapter 6
[ru] fixed some mistypes for chapter 7 (v2)

v2: fixed review comments
[ru] fixed some mistypes for chapter 8 (v2)

v2: fixed review comments
[ru] fixed some mistypes for chapter 9 (v2)

v2: fixed review comments
[ru] chapter 2: Incorporate changes from 7ba4886.

"Added fix for git remote -v example"
[ru] chapter 3: Incorporate changes from a0228ae.

"This should be C3', not C3."
[ru] chapter 7: Incorporate changes from 8ec0ce6.

"Fix inconsistency between code and its output."
[ru] chapter 1: Incorporate changes from 33e9d89.

"Reference whole chapter instead of a single section."
[ru] chapter 4: Incorporate changes from 735d612 and e644082.

"Fixed hosting page link in chapter 4"
"Fixed broken link (hopefully)"
[ru] chapter 5: Incorporate changes from e1d6628.

"Fix inconsistency between command output and figures 5-13, 5-14."
Merge pull request #303 from GArik/RU2

[ru] Fixes for russian translation
Merge pull request #301 from agorf/agorf2

Some minor corrections (formerly agorf branch, now rebased)
Merge pull request #300 from GArik/EN

Fix incorrect example in chapter 9
updated first two paragraphs for chapter 8
translated second part fully
Merge pull request #304 from choclo/master

First paragraphs of chapter08 "es"
Fix some markdown errors in languages
Add test task to Rakefile
Change list of languages by excluding failing ones
Add maruku analysis of markdown error to log

This helps a lot to debug the initial error.