Chapter 4

Updates the table "Content elements" and solves the problem with the
links in the tables.
Updates tables of modules.
Some HTML tags can not be converted (Insert tags in tables).
Adds <abbr> tags.
Added the <code> tag instead of single quotes
 Chapter 4 (in German)

Updates the table "Content elements" and solves the problem with the
links in the tables.
Updates tables of modules.
Some HTML tags can not be converted (Insert tags in tables).
Adds <abbr> tags.
Adds the <code> tag instead of single quotes
The link is for the theme.
Chapter 5 : corrections
Fixed parameters in example for generatePage hook (#23)
Merge pull request #26 from lionel-m/Chapter-5

Chapter 5 : corrections
Merge branch 'chapter-3-link' of https://github.com/lionel-m/docs into 3.0
Four images updated
The arrow was not correctly positioned
Merge pull request #27 from lionel-m/images-update

Images updated
Optimize images an fix too long lines
Remove "abbr" tags
htacess -> htaccess
Merge remote-tracking branch 'lionel-m/Chapter-1' into 3.0
Merge remote-tracking branch 'lionel-m/chapter-4' into 3.0
Translated "Click here" in the german manual
Added minor corrections to lionel-m's pull request
Chapter 4 newsletter images updated
Merge branch 'chapter-4-newsletter-img-update' of https://github.com/lionel-m/docs into 3.0 (#34)