[ja] Apply 1f57d57a48144a978d9f8b52c38550804297ee1d
[ja] Improve translation of chapter 9
[ja] Correct a description of .git/info in chapter 9
[ja] Fix a typo in chapter 9
[ru] Update chapter 1

Fix some punctuation problems.
Merge pull request #438 from rc5hack/master

[ru] Update chapter 1
Merge pull request #436 from uasi/ja-chapter9

[ja] Improve chapter 9
spelling fixes, translation improvements
Merge pull request #440 from gibas/spelling-fixes

spelling fixes, translation improvements
Merge pull request #439 from GArik/RU

[ru] Sync translation with the original and translate one more figure
[ru] Update chapter 4

Fix some punctuation problems.
Merge pull request #441 from rc5hack/master

[ru] Update chapter 4
[en] Update chapter 4

Wikipedia link changes too often, so replace it with kernel.org.
Merge pull request #442 from rc5hack/en

[en] Update chapter 4
chapter 5 translation, few other translation examples added to translation-guidelines.txt
Merge pull request #444 from gibas/05-distributed-git

[pl] chapter 5 translation, few other translation examples added to translati...
Apply 1cfb0503 to all languages

A stable reference page which is not outdated for git hosting is
quite difficult to find. For the moment, just point to the one
on kernel.org.
speling fixes, added blank line between polish and oryginal text
small fix in section name
Add \usepackage{longtable} to fix 'Environment longtable undefined' problem with 'makepdfs zh'