* index.php: add comments for more readable.
* include/functions_extensions.php, extensions/update_manager.php,
extensions/hello, extensions/hello/icon.png, extensions/hello.php,
operation/menu.php, godmode/menu.php: change the mecanic to add extensions
into menu, now you can add extension with icon and into the submenu in any
position of submenu. Change the example "hello" for to show as be.
git-svn-id: https://svn.code.sf.net/p/pandora/code/trunk@1885 c3f86ba8-e40f-0410-aaad-9ba5e7f4b01f
af855daa52