enhance Inflector  helper with ascii function
updated transliteration (greek + russian + german + ukrainian) and removed dependency on ascii function
Merge branch 'upstream' into 364-toAscii

* upstream:
  Fixed build break.
  Fixes issue #194: Added Application::catchAll.
  added missing default to getValue in boostrap tabs
  \yii\widgets\Menu improvement
  Fixes issue #467: allow view file to be absent as long as the themed version exists.
  better auto scrolling.
  Fixes issue #446: automatically scroll to first error.
fix functionality, keep each function to do what it supposed to do
fix test
Merge remote-tracking branch 'upstream/master' into 364-toAscii

* upstream/master: (91 commits)
  fixed init.bat paths
  renamed backstage → backend
  Fixed test break.
  Response WIP
  coding style fix.
  [1] Redone missing code. [2] Added empty line at the end of file [3] Removed exception.
  Updated code style. braces on the same line for control statements.
  Removed unused columsn from find constraint sql. Fixed typo. Added extra schema check for when a foreign table is not in the same schema. Updated indentation to conform to other classes.
  Multilevel Items
  Fixes issue #514.
  Removed the config setting that should not have been commited.
  Removed false exception catching.
  Removed custom pgsql PDO and added defaultSchema as public property.
  CS fixes.
  Minor refactoring of DbMessageSource.
  Response WIP
  Minor refactoring of t().
  Added Jsonable support.
  Fixes #13. Implement DB message source.
  Yii::t() minor fix.
  ...
Extension "authclient" added as draft.
OpenID client created as draft.
Extension "authclient" recomposed.
Classes "\yii\authclient\provider\*" created as draft.
"\yii\authclient\provider\Collection" added.
"\yii\authclient\widgets\Choice" added.
Doc comments at "\yii\authclient\widgets\Choice" fixed.
"yii\authclient\AuthAction" created.
"yii\authclient" structure refactored.
"yii\authclient\AuthAction" fixed.
"yii\authclient\ClientInterface" applied.
Merge branch 'master' of github.com:yiisoft/yii2 into authclient
Merge branch 'master' of github.com:yiisoft/yii2 into authclient
"yii\authclient\clients\GoogleOpenId" added as blank.
Merge branch 'master' of github.com:yiisoft/yii2 into authclient