Moving error handling classes into a separate directory.

Moving error handling test cases into a directory that matches the one in libs.
Updating imports.

cake/bootstrap.php

@@ -26,14 +26,14 @@
 
 require CORE_PATH . 'cake' . DS . 'basics.php';
 require CORE_PATH . 'cake' . DS . 'config' . DS . 'paths.php';
-require LIBS . 'exceptions.php';
+require LIBS . 'error' . DS . 'exceptions.php';
 require LIBS . 'object.php';
 require LIBS . 'inflector.php';
 require LIBS . 'app.php';
 require LIBS . 'configure.php';
 require LIBS . 'set.php';
 require LIBS . 'cache.php';
-require LIBS . 'error_handler.php';
+require LIBS . 'error' . DS . 'error_handler.php';
 
 Configure::bootstrap(isset($boot) ? $boot : true);
 

cake/libs/error_handler.php → cake/libs/error/error_handler.php

@@ -104,7 +104,7 @@ class ErrorHandler {
  * @see http://php.net/manual/en/function.set-exception-handler.php
  */
 	public static function handleException(Exception $exception) {
-		App::import('Core', 'ExceptionRenderer');
+		App::import('Core', 'error/ExceptionRenderer');
 		$config = Configure::read('Exception');
 		if (!empty($config['log'])) {
 			if (!class_exists('CakeLog')) {

cake/tests/cases/libs/all_error.test.php

@@ -38,8 +38,8 @@ public static function suite() {
 
 		$libs = CORE_TEST_CASES . DS . 'libs' . DS;
 
-		$suite->addTestFile($libs . 'error_handler.test.php');
-		$suite->addTestFile($libs . 'exception_renderer.test.php');
+		$suite->addTestFile($libs . 'error' . DS . 'error_handler.test.php');
+		$suite->addTestFile($libs . 'error' . DS . 'exception_renderer.test.php');
 		return $suite;
 	}
 }