improve initial french translation : typos, wording, missed translations
Merge pull request #2 from sgalles/1.1-french-typos

improve initial french translation : typos, wording, missed translations
make walkthrough compile on 1.1
sync examples
minor
.gitignore: Add backup files

Some editors, for example Emacs and Vim, use "filename~" and
"#filename#" for backups.
Add 'de' module for german version

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Add German translation of part 1
Add German translation of part 2
Add German translation of part 3
Add German translation of part 4
Add German translation of part 5
Add German translation of part 6
Add German translation of part 7