Translate intro-yii.md into Brazilian Portuguese
Merge branch 'master' of git://github.com/yiisoft/yii2 into intro-yii-pt-br
notes added
Merge pull request #3830 from Ragazzo/fileinfo_changlog_notes

notes added
Starting french docs
fixed CHANGELOG [skip ci]
French Fix
Merge pull request #3831 from klevron/french-doc

Starting french guide
structure overview translated
Typo in English  guide [skip ci]
fixed list
Merge pull request #3834 from lucianobaraglia/translation-es

Typo in English  guide [skip ci]
Merge pull request #3833 from Ragazzo/strusture_overview_docs_translated

structure overview translated
ru docs aliases
syntax fix [skip ci]
French intro-yii
Merge https://github.com/yiisoft/yii2 into ru-docs-aliases
minor doc edit [skip ci]
Merge https://github.com/yiisoft/yii2 into ru-docs-aliases
small fix