add autocomplete for model class field
fix to "You don't want to generate model class name if it is already entered."
ajax removed
remove ajax from controller
fixed asterisk bug, update chanelog
fic changelog spaces
Add Chinese Translation Team
Merge remote-tracking branch 'chinesization/master'
Update README [skip ci]
transalating intro-upgrade-from-v1, left with asset, query builder, form, etc.
Spanish guide structure-controllers.md [skip ci]
Same fix as ff8225c78d23d04731e98eebbd57c48b59e493eb [skip ci]
Finished widget tutorial [skip ci]
Update translation-status.md
Merge pull request #4011 from lucianobaraglia/translation-es

Spanish guide structure-controllers.md [skip ci]
Minor changes in Estonian translation
Merge pull request #4014 from stevekr/master

Minor changes in Estonian translation
更新文档
Fix typo [skip ci]
Imagick image can not be converted to string on HHVM

made it consistent with the GD function.

See also https://github.com/yiisoft/yii/pull/3406