Rich text editor file in own module folder

Please make it possible to place rte setting file in your own module folder instead of confined to /system/config folder.
Usage: 
```php
 'eval' => array('rte'=>'tinyPath::/system/modules/myModule/assets/myRTE.php', 
```
I choose "tinyPath::" because inside class DataContainer.php your are looking for the occurrence of word 'tiny' in first 4 characters.
```php
//line 445
if (isset($arrData['eval']['rte']) && strncmp($arrData['eval']['rte'], 'tiny', 4) === 0)
```