Fix #57: Upgrade to v1.7.0
russian language support
Merge pull request #59 from DarkAiR/master

fix #58 Russian language support
Added sortable and date range inputs
Merge branch 'master' of https://github.com/kartik-v/yii2-grid
Added screenshot to docs
Added screenshot to docs
Merge commit '222e4c523e63acb2bc13487775d170b606bc8fdb'

* commit '222e4c523e63acb2bc13487775d170b606bc8fdb':
  Added screenshot to docs
  Added screenshot to docs
  Added sortable and date range inputs
  russian language support
  Fix #57: Upgrade to v1.7.0