add structure-overview.md
add structure-entry-scripts.md
Grammar fix
Merge branch 'master' of github.com:yiisoft/yii2
Merge branch 'master' of github.com:yiisoft/yii2
Fix for #4372
Doc update [skip ci]
Changelog update [skip ci]
Merge with master
Update .gitignore
Update .gitignore
Fixes #4636: Added `yii\web\Response::setDownloadHeaders()`
Fixes #4501: Renamed the constant `YII_PATH` to `YII2_PATH`
added bower.json for yii2-framework. [skip ci]
updated ignore. [skip ci]
adjust bower.json further [skip ci]
do not export mailer in BaseMailerTest message

fixes test break in HHVM due to export of a closure
fixed some inconsistnecies in HHVM tests

exclude parts that have different default values
more on HHVM compatibility
skip application tests on HHVM