Correct incorrect class name.

Fixes cakephp/cakephp#4560
[zh] start Simplified Chinese translation

add
- /index.rst
- /contributing.rst
- /contributing/
Line length
Merge pull request #1714 from cakephp/master-line-length

Line length
Clarify casts.
wording
Fix double negative for hard line length
[zh] align table cell boundary (| and +), giving Chinese characters same space as English characters instead of double bytes vs single byte.
Update views.rst, deprecation of $title_for_layout

Added note on deprecation of $title_for_layout as described in 2.5 migration guide
Merge pull request #1717 from mstra001/patch-1

Update views.rst, deprecation of $title_for_layout
[fr] fix sphinx warnings

especially glossary terms
Update controllers.rst, deprecation of $title_for_layout
Update controllers.rst
Merge pull request #1719 from mstra001/patch-1

Update controllers.rst, deprecation of $title_for_layout
[zh] add/update build tooling files for language zh
[zh] re-wrap at column 80, giving Chinese characters the same space as English characters instead of double bytes vs single byte.
[fr] fix typo in french translation
Merge pull request #1712 from blackpuppy/zh

[zh] start Simplified Chinese translation