Added to the MCX360: Suggestions section

Clarification of the "Do not request mods" rule:

 * __Do not request mods__
 
Do not request new mods, existing mods or ideas for mods in this section. Referencing an existing mod as context for your feature request is acceptable, however specific mod requests alone are not allowed. This includes DLC marketplace requests. Modifications to the Minecraft: Xbox Edition is against the [Xbox Live Terms of Use](http://www.xbox.com/en-US/legal/livetou).