Add migrateCGroup.php
migrateCGroup: Check nested noinclude
migrateCGroup: Remove <!-- --> from comments
migrateCGroup: Put a comment before the item if it follows the item
migrateCGroup: Remove /doc creation
migrateCGroup: Make Lua redirects
migrateCGroup: Use brackets for Lua strings containing newlines
migrateCGroup: Handle <NOINCLUDE>
migrateCGroup: Add a dry-run option
migrateCGroup: Output surrounding text in exceptions