Merge pull request #1635 from antograssiot/3.0

Merging as PR is complete. thank's @Admad
Fix code
Merge pull request #1637 from Hikkijp/patch-3

Fix code
Add docs for Collection::combine()

Fixes #1638
General rewording/relinking 

Documentation right now really differs from English to Spanish. I'll try to update as much as I can.
Merge pull request #1641 from ricardovegas/patch-1

General rewording/relinking
Update components.rst

Including a param for Controller throws a warning that no second argument is passed. I assume you are now supposed to `$event->getSubject()` instead of being passed a controller, or use `getController()` from the constructors collection.
"previous", "next" links are in reverse order than usual. #1428
If installed through composer no need to perform some manual steps
Merge pull request #1643 from davidyell/patch-6

3.0 Update components.rst
Merge pull request #1645 from mar3k/3.0-1428

"previous", "next" links are in reverse order than usual. #1428
Merge pull request #1647 from spiliot/3.0-tutorial-blog

If installed through composer no need to perform some manual steps
Update how to set the page title.

cakephp/cakephp#4370 pointed out that the documentation was confusing
and totally unclear. I hope this clarifies this.
Merge pull request #1648 from cakephp/title-update

Update how to set the page title.
Adds filename. :construction: need to check path
adds filename to plugin loading example
Merge pull request #1649 from alecho/patch-3

Adds filename. :construction: need to check path
remove exception.rst