Adds assassin holoparasites

Assassin holoparasites can go invisible, causing their next attack to do massive damage and ignore armor.
The stealth will be broken by attacking or taking damage.

code/modules/tooltip/tooltip.html

@@ -42,6 +42,9 @@
 		.blob .wrap {border-color: #2E2E2E;}
 		.blob .content {color: #82ED00; border-color: #4E4C4A; background-color: #191918;}
 
+		.parasite .wrap {border-color: #88868D;}
+		.parasite .content {color: #EFEEEF; border-color: #35333A; background-color: #636169;}
+
 		.wraith .wrap {border-color: #492136;}
 		.wraith .content {border-color: #331726; background-color: #471962;}