range-requests added
 [Uk] Fixing typos
[ci skip]
 [Uk] Fixing typos
[ci skip]
Merge pull request #2469 from yiiframework-com-ua/uk_docs

[Uk] Updating UK docs
[ci skip]
Merge branch 'http-request-range-enh' of git://github.com/Ragazzo/yii into Ragazzo-http-request-range-enh
Added 206 header, code style fixes
Added changelog