deprecated DEFAULT_LANGUAGE
In debug mode missing directories will now be automatically created to avoid unnecessary errors thrown when using the FileEngine
note in logging section
wording
Copied original file
Translated all titles.
Added some drafts
Transslated ja/core-utility-libraries/app.rst
Reset .gitignore
Reset .gitignore
Corrected line feed characters to LF from CRLF
fix Japanese translation to make it more clearly.
Merge pull request #695 from waterada/fix_part-two

I have fixed Japanese translation to make it more clearly.
Corrected some fault according to reviews.
Update docs for removal of non-features.
Merge pull request #690 from zuborawka/ja-app

Translate ja/core-utility-libraries/app.rst
I feel it`s better.
[fr] Follow #688

Sanitize docs
[fr] Follow #694

Update routing.rst
[ja] mending a translation of app.rst