Merge pull request #3 from m-ka/master

ru-RU: chapter 8 translated
5.3
ru-RU: fixes in 00b_foreword.po and Book-Info.po
5.4
ru-RU: more little fixes in 00b_foreword.po
Merge pull request #5 from alexander-naumov/master

ru-RU: 5.3 (fixed) + first step of 5.4
yet another patch for 5.4
Merge pull request #6 from alexander-naumov/master

ru-RU: yet another patch for 5.4
5.4 (final)
Update "Short remedial course" appendix
Merge pull request #7 from alexander-naumov/master

ru-RU: 5.4 (final)
Merge remote-tracking branch 'upstream/master'
ru-RU: update 92_short-remedial-course.po
Merge pull request #8 from m-ka/master

Обновлена глава 06, добавлен файл translations
ru-RU: chapter 07 updated