Extensions were added twice
Updated changelog
Translate intro-yii.md into Brazilian Portuguese
Merge branch 'master' of git://github.com/yiisoft/yii2 into intro-yii-pt-br
ru docs aliases
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
structure entry scripts guide translated
French Fix
French Fix
Merge pull request #3836 from Ragazzo/structure_entry_scripts_docs_translated

structure entry scripts guide translated
Merge pull request #3835 from zxcq544/ru-docs-aliases

Ru docs aliases and small fix to autoloading
Merge pull request #3837 from klevron/french-doc

French intro-yii
Spanish start-installation.md and typo in english guide [skip ci]
French intro-upgrade-from-v1 (wip) [skip ci]
Merge pull request #3838 from lucianobaraglia/translation-es

Spanish start-installation.md and typo in english guide [skip ci]
structure application components translated