[MIRROR] New DCS signals (#2741)

* New DCS signals

* Update atoms.dm

* actually ports comsigs

code/game/atoms_movable.dm

@@ -1,4 +1,3 @@
-
 /atom/movable
 	layer = OBJ_LAYER
 	var/last_move = null
@@ -117,6 +116,7 @@
 
 //Called after a successful Move(). By this point, we've already moved
 /atom/movable/proc/Moved(atom/OldLoc, Dir)
+	SendSignal(COMSIG_MOVABLE_MOVED, OldLoc, Dir)
 	if (!inertia_moving)
 		inertia_next_move = world.time + inertia_move_delay
 		newtonian_move(Dir)
@@ -215,6 +215,7 @@
 //to differentiate it, naturally everyone forgot about this immediately and so some things
 //would bump twice, so now it's called Collide
 /atom/movable/proc/Collide(atom/A)
+	SendSignal(COMSIG_MOVABLE_COLLIDE, A)
 	if(A)
 		if(throwing)
 			throwing.hit_atom(A)
@@ -308,6 +309,7 @@
 
 /atom/movable/proc/throw_impact(atom/hit_atom, throwingdatum)
 	set waitfor = 0
+	SendSignal(COMSIG_MOVABLE_IMPACT, hit_atom, throwingdatum)
 	return hit_atom.hitby(src)
 
 /atom/movable/hitby(atom/movable/AM, skipcatch, hitpush = TRUE, blocked)
@@ -692,4 +694,4 @@
 		return FALSE
 	if(anchored || throwing)
 		return FALSE
-	return TRUE
+	return TRUE