Removes the majority of phazon pieces. (getting the full set has an extremely tiny number of succeeding, and you can't get the circuit board anyways. I kept one so people know it still exists.) Adds high tier contraband you can find in trash piles to give an alternative way to obtain these. Hopefully encourages more people to mine to get points and resources for science. If you feel this isn't balanced enough, can always increase the probability of getting cosmetic or lesser items to dilute the pool.
* Remove remaining hard del()'s in our code.
* Replace deleted() and gcDestroyed with QDELETED macro.
* Fix some strange calls directly to Del() (capital D)
* Make Destroy() return qdel hints.
* Make a few of the Destroy()'s more comprehensive in cleaning up references.
* In edited Destroy() procs, converted to use qdel_null and qdel_null_list macros when possible for pretty code.
* Removed unused variable `sleevecard`
