[zh] add /zh/pdf-contents.rst to fix sphinx build error
[zh] fix lang=en error in *contents.rst files
[zh] fix sphinx build warnings about nonexisting document in *contents.rst
[zh] try to fix sphinx warnings in build #1986
update fr migration guide
ends review of appendices
Merge pull request #1722 from blackpuppy/zh

[zh] fix sphinx build errors from last pull request #1721
[zh] try to fix sphinx build warnings in build #1987
Exclude zh from PDF builds.

We don't have the correct latex packages on the server to build a PDF
version of the zh docs.
minor corrections

- fix typos
-format configuration chapter
Merge pull request #1724 from cakephp/3.0-small-updates

3.0 - minor corrections
[fr] - review migration guide
Link to the cakephp console section from page for code generation with bake.
Start integration testing section.
[fr] review orm migration
Merge pull request #1727 from cakephp/3.0-fr-appendices

3.0 [fr] appendices translation
[fr] small fix in appendices
Merge pull request #1728 from cakephp/3.0-fr-sphinx-corrections

3.0 fr sphinx corrections
Update testing chapters for IntegrationTestCase addition.
Update migration guide.