Committed Cael Aislinn's proposed commit: http://forums.nanotrasen.com/viewtopic.php?f=16&t=11641

- Xenos suit and helm (completely obscuring, and almost indistinguishable from drones) (admin spawned only for now). 
- Facehuggers now have different icon states for being thrown and after impregnation. 
- New death, unconscious and sleeping icons for aliens. 
- New icon (and projectile type) for neuroxotin. 
- New infection overlay images for telling aliens about pregnant humans (3 icons, showing the progression of the infestation). 
- New system for handling alien impregnation (alien embryos are an object inside the mob, instead of a disease). 
- Players can be operated surgically to remove the alien embryos (targetting the chest: scalpel, surgical saw, hemostat, retractors. If the embryo is nearly fully developed, it might come out alive though. 
- Corgis can now get impregnated. 
- There is a short animated overlay of a chestburster when it comes time to burst chests. 
- Alien larva now have three different icon sets, depending on their growth (25% they are bloody and pale, 25% - 75% they are pale, 75% onwards they are deep red).


Fixed up table smashing, and added rack smashing in the same way.
Added new north/south facing for the large alien queen.
Updated the changelog.

git-svn-id: http://tgstation13.googlecode.com/svn/trunk@5493 316c924e-a436-60f5-8080-3fe189b3f50e

code/modules/clothing/head/misc.dm

@@ -171,3 +171,11 @@
 	icon_state = "bearpelt"
 	item_state = "bearpelt"
 	flags = FPRINT | TABLEPASS | BLOCKHAIR
+
+/obj/item/clothing/head/xenos
+	name = "xenos helmet"
+	icon_state = "xenos"
+	item_state = "xenos_helm"
+	desc = "A helmet made out of chitinous alien hide."
+	flags = FPRINT | TABLEPASS | BLOCKHAIR
+	flags_inv = HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE

code/modules/clothing/suits/miscellaneous.dm

@@ -211,4 +211,12 @@
 	else
 		usr << "You button-up some imaginary buttons on your [src]."
 		return
-	usr.update_inv_wear_suit()
+	usr.update_inv_wear_suit()
+
+/obj/item/clothing/suit/xenos
+	name = "xenos suit"
+	desc = "A suit made out of chitinous alien hide."
+	icon_state = "xenos"
+	item_state = "xenos_helm"
+	body_parts_covered = UPPER_TORSO|LOWER_TORSO|LEGS|ARMS|HANDS
+	flags_inv = HIDEGLOVES|HIDESHOES|HIDEJUMPSUIT