Corrections

If we cut a URL, the link will be broken.
Update "palettes.jpg"
Add own Hooks
Add third parameter and docblock to example
Add Typehint
Add docblock and undocumented parameter
Move to cookbooks/de
80 char limit
Minor corrections and spelling mistakes
Merge branch 'psren/hooks' into 2.11
Merge branch '2.11' into 2.11-ja.