Update 02classes.ceylon

Typo
Fix typos
Spanish translations
Minor fixes
update code for Ceylon 1.1
necessary?
oops, forgot to ad module descriptors!
parameter names changed
Add french translation
Merge pull request #1 from sgalles/1.1-french

Add French translation
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

(No content yet)
Add German translation of part 1
Add German translation of part 2
Add German translation of part 3