[pl] chapter 7 improvements
[pl] s/tą komendę/tę komendę/
Fix issue #620
[ko] update fonts and thanks for pdf
[ko] update ko/README
[ko] update translation
[ko] fix typo.
[ko] fix punctuations for figure
[de] Fix some incorrect comment syntax in german translation

- This makes it easier to use tools for automatic merge of original english
   text to german translation
[de] Chapter 2: Merge original english updates to german translation and translate them
[de] Chapter 3: Merge original english updates to german translation and translate them
[de] Chapter 4: Merge original english updates to german translation and translate them
[de] Chapter 5: Merge original english updates to german translation and translate them
[de] Chapter 6: Merge original english updates to german translation
[de] Chapter 7: Merge original english updates to german translation and translate them
[de] Chapter 8: Merge original english updates to german translation
[de] Chapter 9: Merge original english updates to german translation
Fix broken syntax
Merge pull request #623 from gibas/07-customizing-git

[pl] chapter 7 improvements
Merge pull request #624 from gibas/fix-ta-komende

[pl] s/tą komendę/tę komendę/