Moves mob/var/datum/changeling/changeling to datum/mind/var/datum/changeling (changeling datums are now held by minds rather than mobs)

As such, changelings can now be reported at round-end, even after gibbing. Resolves Issue 251

Changeling power proc_holders are now datums rather than objects.
Condensed all those changeling stings down a bit. This will make fixing issue 351 easier to fix

Replaced changeling fakedeath and a number of checks for the zombiepowder reagent with a bitflag: mob/var/status_flags & FAKEDEATH
setting the FAKEDEATH flag will make the mob appear dead in exactly the same way changeling parasting and parapens worked. I've updated changelings and zombiepowder to work with this flag.

Bug fixes for the staff of change. There was a type mismatch and I typo'd "alien" as "xeno" so xenos were not being randomly picked.

TODO:
changeling purchased verbs could probably be moved to mind/special_verbs. Likewise, other modular antag proc-holders can be merged with the changeling system using the same type of datum. (namely wizards)

git-svn-id: http://tgstation13.googlecode.com/svn/trunk@4377 316c924e-a436-60f5-8080-3fe189b3f50e

code/datums/mind.dm

@@ -48,7 +48,8 @@ datum/mind
 
 	var/has_been_rev = 0//Tracks if this mind has been a rev or not
 
-	var/datum/faction/faction // associated faction
+	var/datum/faction/faction 			//associated faction
+	var/datum/changeling/changeling		//changeling holder
 
 	New(var/key)
 		src.key = key
@@ -58,6 +59,8 @@ datum/mind
 		if(!istype(new_character))
 			world.log << "## DEBUG: transfer_to(): Some idiot has tried to transfer_to() a non mob/living mob. Please inform Carn"
 		if(current)					//remove ourself from our old body's mind variable
+			if(changeling)
+				current.remove_changeling_powers()
 			current.mind = null
 		if(new_character.mind)		//remove any mind currently in our new body's mind variable
 			new_character.mind.current = null
@@ -65,6 +68,9 @@ datum/mind
 		current = new_character		//link ourself to our new body
 		new_character.mind = src	//and link our new body to ourself
 
+		if(changeling)
+			new_character.make_changeling()
+
 		if(active)
 			new_character.key = key		//now transfer the key to link the client to our new body
 
@@ -183,7 +189,7 @@ datum/mind
 				text += "<b>YES</b>|<a href='?src=\ref[src];changeling=clear'>no</a>"
 				if (objectives.len==0)
 					text += "<br>Objectives are empty! <a href='?src=\ref[src];changeling=autoobjectives'>Randomize!</a>"
-				if (current.changeling && (current.changeling.absorbed_dna.len>0 && current.real_name != current.changeling.absorbed_dna[1]))
+				if( changeling && changeling.absorbed_dna.len && (current.real_name != changeling.absorbed_dna[1]) )
 					text += "<br><a href='?src=\ref[src];changeling=initialdna'>Transform to initial appearance.</a>"
 			else
 				text += "<a href='?src=\ref[src];changeling=changeling'>yes</a>|<b>NO</b>"
@@ -630,25 +636,24 @@ datum/mind
 						ticker.mode.changelings -= src
 						special_role = null
 						current.remove_changeling_powers()
-						if(current.changeling)
-							del(current.changeling)
-						current << "\red <FONT size = 3><B>You have been brainwashed! You are no longer a changeling!</B></FONT>"
+						if(changeling)	del(changeling)
+						current << "<FONT color='red' size = 3><B>You grow weak and lose your powers! You are no longer a changeling and are stuck in your current form!</B></FONT>"
 				if("changeling")
 					if(!(src in ticker.mode.changelings))
 						ticker.mode.changelings += src
 						ticker.mode.grant_changeling_powers(current)
 						special_role = "Changeling"
-						current << "<B>\red You are a changeling!</B>"
+						current << "<B><font color='red'>Your powers are awoken. A flash of memory returns to us...we are a changeling!</font></B>"
 				if("autoobjectives")
 					ticker.mode.forge_changeling_objectives(src)
 					usr << "\blue The objectives for changeling [key] have been generated. You can edit them and anounce manually."
 
 				if("initialdna")
-					if (!usr.changeling || !usr.changeling.absorbed_dna[1])
+					if( !changeling || !changeling.absorbed_dna.len )
 						usr << "\red Resetting DNA failed!"
 					else
-						usr.dna = usr.changeling.absorbed_dna[usr.changeling.absorbed_dna[1]]
-						usr.real_name = usr.changeling.absorbed_dna[1]
+						usr.dna = changeling.absorbed_dna[changeling.absorbed_dna[1]]
+						usr.real_name = changeling.absorbed_dna[1]
 						updateappearance(usr, usr.dna.uni_identity)
 						domutcheck(usr, null)