[nl] All chapters - Add header and SHA-1 of current HEAD

	Added SHA-1 of current head to be used in future to
	allow for easier (hopefully) comparison of changes in
	en - original texts.
Merge pull request #689 from Cpt-xx/synchVersions

[nl] All chapters - Add header and SHA-1 of current HEAD
[zh] Update Chapter 5
Merge pull request #690 from biluncloud/master

[zh] Update Chapter 5
[de] Drop trailing spaces
[de] Apply changes from 'en' original
add 03-git-branching
update to 3-8
finish 3-1
Update 3.2
3.2 word error
chapter 3 finished
add Chapter 4
chapter 5 finished
Merge pull request #697 from ya-hsiung/master

add zh-tw chapter 3,4,5
Merge pull request #694 from progit-de/master

Update 'de' locale