Fix git's output

When committing to a branch, git commit prints the branch name, "slow-blink" this time, not master.
Format git username uniformly.
Merge pull request #144 from paveljanik/patch-5

Fix git's output
Merge pull request #145 from paveljanik/formatgituser

Format git username uniformly.
Fix some typos

Signed-off-by: Thomas Ackermann <th.acker@arcor.de>
Fix commit reference
Merge pull request #146 from tritemio/master

Fix commit reference
Merge pull request #143 from tacker66/fix_some_typos

Fix some typos
Contributing.md
Translation and figure notes -> contributing.md
License for print edition
asciidoc != markdown
Merge pull request #142 from progit/contributors-guide

Contributor's guide
Merge pull request #1 from progit/master

Test Pull Request