Remove exec rights on fr/02-git-basics/01-chapter2.markdown
[fr] Chapter 1 corrections
[fr] Chapter 2 corrections
[fr] Chapter 3 corrections
[fr] Chapter 4 corrections
Merge pull request #353 from phambourg/fr_corrections

[fr] Chapters 1-4 corrections
makeebooks: assign default values of titles

Assign default values to figure_title, book_title, authors and
comments. To prevent variables from being 'nil' or previous values.
makeebooks: remove duplication
Merge pull request #354 from southly/fix-makeebooks

Fix makeebooks
[fr] Chapter 5 corrections
Merge pull request #355 from phambourg/fr_corrections

[fr] Chapter 5 corrections
[fr] Chapter 6 corrections
Merge pull request #356 from phambourg/fr_corrections

[fr] Chapter 6 corrections
Fix apt-get install command (git-core -> git)

git-core was the historical Debian package name, but it has been changed
a while ago.
Fixed typos.
Merge pull request #358 from moy/master

Fix apt-get install command (git-core -> git)
Merge pull request #359 from burakerdem/master

Fixed typos
[de] Fix headings, remove extra chapters.

Fixes issue #360.
Fix confusion between changes and revisions.
Merge pull request #362 from GArik/EN

Fix confusion between changes and revisions.