make bake working as first level summary
update css for the menu
remove duplicated content
update code-generation link
add bake to pdf and epub generation
fix build warning
Some tweaks to the bake documentation.
Wrap long lines.
move bake in the summary
[fr] follow bake 3.0 #2095
[fr] follow #2091, #2094 and #2096
[fr] follow #2097
polish fr translation
Merge pull request #2095 from cakephp/3.0-bake

3.0 bake
Add example of IS NOT NULL generation
Add missing ---'s
Merge pull request #2100 from dakota/3.0-is-not-null

Add example of IS NOT NULL generation
Add example of using SQL function inside a where clause
Add missing ;
Add example of using any SQL function