- Refactored checking for fatal error.
- Suppressed errors in exception handler in case of fatal errors.

- Correct exit code for require errors in CLI mode. It was 0 even in case of error.
- Solved handling fatals and displaying custom error template w/o output buffering.
- If XDEBUG is available, error screen will display trace (implementation inspired by Kohana and Nette).
- Added ErrorException to store/display type of the error and user-friendly messages.
- Fatals are still logged in PHP log.
- Turned off native display_errors since we're now catching all errors.
- Added reserving memory (256kb) . Can be removed safely. In case of removal we're losing only memory exhausted error when allocating last very small chunk of memory.
- Properly handled errors in __toString (exception can't be thrown in this case).
- In the YII_DEBUG===false mode it's bad to display exception name even in page title.
- In the YII_DEBUG===true mode it's still useful to get user-friendly message additionally to exception name.

I18N WIP.

Finished migrate command.

* 'master' of git.yiisoft.com:yii2:
  moved ConsoleColor.
  Finished ViewRenderer.
  ViewRenderer WIP

* 'master' of git.yiisoft.com:yii2:
  Added Command::batchInsert()
  exception cleanup.
  error handling cleanup.
  console app cleanup.
  MVC cleanup
  MVC WIP
  MVC WIP
  MVC WIP
  cleanup.
  MVC WIP
  refactored logging. MVC WIP
  MVC WIP
  patched controller and action creation
  todo updates.

Conflicts:
	framework/console/View.php

Planning a view structure in there, not sure if naming should be view or
widget yet.