[de] (08) minor spelling fix
Merge pull request #509 from weh/master

[de] (08) minor spelling fix
Revert maruku to 0.6.1

maruku 0.7.0 has a bug where code blocks starting with a star are
interpreted as lists.
[pl] next part of chapter 7
Merge branch 'master' of https://github.com/progit/progit into 07-customizing-git
Merge pull request #510 from gibas/07-customizing-git

[pl] next part of chapter 7
[th] Retranslate README file
Rename README to README.md

Fix document not render in GitHub
Merge pull request #511 from Reizinixc/th

[th] Retranslate README file