DB/Misc: Fel Crystal Prism

* Spawn missing spawns of Fel Crystal Prism http://www.wowhead.com/object=185927
* Script these to be usable to summon demons (needed in order to properly complete a Felwhip for Gahk!) at a cost of 35 Apexis shards
* Scripts for the 4 demons
* Adjustments to the egg scripts I made earlier have had to add the spell to take reagents to script (even though is meant to be triggered from other spell) but was failing ie not taking reagents.