It allows to filter actions by HTTP request methods

added decimalSeparator and thousandSeparator properties.
issue #48

Fixed some wording

Added missing use statement.

* upstream: (122 commits)
  Refactored StringHelper.
  Line number tweak for error page
  added note about dependency to registerJsFile
  docs: Be explicitly clear about ActiveRecord::create()
  fixed AutoTimestamp example in advanced app
  \yii\rbac\DbManager::isAssigned() signature fix
  Changed the way to set timestamp for multiple attributes.
  Fixes issue #428 Allowing UniqueValidator to be used with non-AR models.
  Better exception page look.
  Removed unnecessary code from MSSQL schema.
  Hover and error line increased by 1 px.
  Error line number fix.
  Error line number fix.
  Error line number fix.
  Lift off!11 #418
  MSIE fix.
  Fixes (theoretically) #418 and #413.
  Removed echo
  RBAC DbManager fixes
  Always refetch the migration table definition.
  ...

ensure lines are aligned right:
```
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10
11
12
...
```

Fixes #373

fixes #429

\yii\rbac\DbManager::isAssigned() signature fix