Added enviromental variable tip for debug and deployment
Clarified Containable filtering limitations

It isn't clear when using containable that an INNER JOIN isn't happening when filtering by a deeper level association, when it really is only affecting the subquery. I added an explanation and an example.
Further clarification

Added an example to return the expected results.
Restructure & add TOCs to more places.

Add table of contents to the Components, Helpers and Behaviors pages.
These pages currently make the list of core features harder to find than
they should be.

Adjust the existing TOC's to require less maintenance in the future and
include fewer irrelevant results (empty toc pages).
Fixed double-space
Restore old manually sorted TOC sections.

Move content so toc-XX pages aren't just stub chapters.
Re-use toc lists so we don't have to maintain two sets of tocs.
Update TOC to be ordered by frequency of use.

Also remove the deprecated email component from the toc list.
Exclude files to reduce whining.

Sphinx whine when files aren't in the TOC's exclude a few to shut it up.
Fix broken formatting.
Merge pull request #747 from cakephp/restructure-tocs

Restructure & add TOCs to more places.
[fr] Follow #747

Restructure & add TOCs to more places.
Fixed SysloLog typo
Merge pull request #750 from derekperkins/patch-2

Fixed SysloLog typo
[fr] Follow #750

Fixed SysloLog typo
Fix CakePlugin::loadAll() example

Global options need to be passed as a array of array in CakePlugin::loadAll method.
Merge pull request #752 from CauanCabral/patch-1

Fix CakePlugin::loadAll() example
[fr] Follow #752 & update 2.3 migration guide

Fix CakePlugin::loadAll() example & update 2.3 migration guide
[fr] Fix typo in 2.4 migration guide
Temporary fix for missing pdf file