CHANGELOG.md updated
Merge pull request #3614 from klimov-paul/route-url-encode

Route parameter url encoding added
improved PDF version of the guide

- better title page,
- book style,
- improved internal linking using labels and references
Update extend-using-composer.md

better usage of URL in latex
better listings in guide pdf
guide WIP [skip ci]
Fixes #3601: Fixed the bug that the refresh URL was not generated correctly by `Captcha`
limit condition changed
Fixed hashKey [skip ci]
finished PDF support for guide

added class references (current version without hyperlink)
fixed test breaks after #3614
Update README.md
Finished application guide [skip ci]
minor format fix [skip ci]
added anchors [skip ci]
Fix Arabic translation
Merge pull request #3621 from zqrt/patch-3

Fix Arabic translation
Doc comments for the 'mutex' classes extended
Update yii.php
Merge pull request #3624 from makroxyz/master

[skip ci] Italian translation fixes