Rename ShellHelper to BaseShellHelper to avoid potential naming conflicts with existing apps

lib/Cake/Console/Helper/BaseShellHelper.php

@@ -13,7 +13,7 @@
  * @license       http://www.opensource.org/licenses/mit-license.php MIT License
  */
 
-abstract class ShellHelper {
+abstract class BaseShellHelper {
 
 /**
  * Default config for this helper.

lib/Cake/Console/Helper/ProgressShellHelper.php

@@ -12,12 +12,12 @@
  * @since         2.8
  * @license       http://www.opensource.org/licenses/mit-license.php MIT License
  */
-App::uses("ShellHelper", "Console/Helper");
+App::uses("BaseShellHelper", "Console/Helper");
 
 /**
  * Create a progress bar using a supplied callback.
  */
-class ProgressShellHelper extends ShellHelper {
+class ProgressShellHelper extends BaseShellHelper {
 
 /**
  * The current progress.

lib/Cake/Console/Helper/TableShellHelper.php

@@ -12,13 +12,13 @@
  * @since         2.8
  * @license       http://www.opensource.org/licenses/mit-license.php MIT License
  */
-App::uses("ShellHelper", "Console/Helper");
+App::uses("BaseShellHelper", "Console/Helper");
 
 /**
  * Create a visually pleasing ASCII art table
  * from 2 dimensional array data.
  */
-class TableShellHelper extends ShellHelper {
+class TableShellHelper extends BaseShellHelper {
 
 /**
  * Default config for this helper.

lib/Cake/Console/Shell.php

@@ -789,7 +789,7 @@ class Shell extends Object {
  * Load given shell helper class
  *
  * @param string $name Name of the helper class. Supports plugin syntax.
- * @return ShellHelper Instance of helper class
+ * @return BaseShellHelper Instance of helper class
  * @throws RuntimeException If invalid class name is provided
  */
 	public function helper($name) {