[cs] typo in chapter 1
Merge branch 'master' of https://github.com/progit/progit.git
[cs] Chapter 2 manually revised up to 2.3 including
[cs] translation revision of Chapter 2
Merge branch 'master' of https://github.com/progit/progit.git
[cs] fixing the markup; minor translation enhancements
[cs] revision of Chapter 3 finished
[cs] minor formulation correction in chapter 2
Merge pull request #837 from pepr/master

[cs] revision of chapters 2 and 3 finished