Populate the topics page.

It should have some stuff.
replace vendor/bin/ by bin/
Merge pull request #1778 from cakephp/3.0-bin-moved

replace vendor/bin/ by bin/
[pt] [3.0] Update index.rst

Review of text and removal of unecessary words.
Merge pull request #1780 from andtxr/patch-1

[pt] [3.0] Update index.rst
Merge pull request #1774 from cakephp/topics-list

Populate the topics page.
[fr] follow #1774
Add docs for getting a component's controller.
[3.0] [en] Update intro.rst

Correcting var name mistake.
Merge pull request #1785 from andtxr/patch-3

[3.0] [en] Update intro.rst
[fr] follow #1785
add french translation
Merge pull request #1783 from cakephp/issue-1781

Add docs for getting a component's controller.
Removed traces of --stderr
Merge pull request #1786 from cakephp/3.0-removed-stderr-traces

Removed traces of --stderr