Update components.rst

Added: namespace App\Controller\Component; on component creation, this was missing in the documentation.
Without it it give a a error that a custom component is not found.
Updated getting-started/cakephp-conventions.rst
Updated Spanish translations for cakephp-folder-structure.rst and cakephp-structure.rst
Added missing config path in paths list
Starting docs for the new i18n layer
Minor misspelling
Update components.rst

Added new line after:  namespace App\Controller\Component; as requested
Merge pull request #1544 from peterhofman/patch-1

Update components.rst
Update docs for themes and data views.
Update console docs.

* Remove API doc style.
* Add sections.
* De-dupe contents.
Header corrections
Fixed table names
Merge pull request #1561 from elboletaire/3-0-spanish-translations

3.0 - "Getting Started" Spanish translations updated
Merge pull request #1564 from cakephp/3.0-proof-pt5

3.0 proof pt5
Improve plugin docs to clarify some points.

Try to address the confusion that came up in cakephp/cakephp#4188
Merge pull request #1568 from cakephp/plugin-clarification

Improve plugin docs to clarify some points.
Improvents in the i18n docs
Adding a Quick Tour section to the query builder chapter

I figured there where plenty people that did not understand the philosophy
of Query objects to the point that they had troubles getting the first
result of the result set.
Fixed typo
Fixed another typo