Fixes issue 521.

Fixes issue 676.
Fixes issue 700.
Fixes issue 753.
Fixes issue 754.
Fixes issue 755.

Additionally I slightly cleaned up grenade code and stunglove code, and removed mustardbomb.dm (because it was fucking awful).

THIS BUGFIX TRAIN AIN'T STOPPIN'
Thanks QualityVan for the issue 521 fix, and thanks Nodrak & Tobba for pointing out my dumbness for issues 753 & 754 respectively.

git-svn-id: http://tgstation13.googlecode.com/svn/trunk@4382 316c924e-a436-60f5-8080-3fe189b3f50e

code/datums/spells/ethereal_jaunt.dm

@@ -80,28 +80,8 @@
 	var/turf/newLoc = get_step(src,direction)
 	if(!(newLoc.flags & NOJAUNT))
 		loc = newLoc
-/*
-	switch(direction)
-		if(NORTH)
-			src.y++
-		if(SOUTH)
-			src.y--
-		if(EAST)
-			src.x++
-		if(WEST)
-			src.x--
-		if(NORTHEAST)
-			src.y++
-			src.x++
-		if(NORTHWEST)
-			src.y++
-			src.x--
-		if(SOUTHEAST)
-			src.y--
-			src.x++
-		if(SOUTHWEST)
-			src.y--
-			src.x-- */
+	else
+		user << "<span class='warning'>Some strange aura is blocking the way!</span>"
 	src.canmove = 0
 	spawn(2) src.canmove = 1