Invoke can now only invoke method in class 'invoke', likewise for 'probe'

luprex/lua/login.lua

@@ -1,6 +1,7 @@
-makeclass("world")
+makeclass('world')
 makeclass('login')
-makeclass("engio")
+makeclass('probe')
+makeclass('invoke')
 makeclass('cube')
 makeclass('sphere')
 
@@ -23,7 +24,7 @@ function world.init()
     login.init()
 end
 
-function engio.move(action, xyz, facing)
+function invoke.move(action, xyz, facing)
     -- todo: sanity check the parameters.
     tangible.animate{tan=actor, anim={action=action, interactive=true, xyz=xyz, facing=facing}}
 end
@@ -54,7 +55,7 @@ function sphere.lookhotkeys(add)
 end
 
 
-function engio.getlookat()
+function probe.getlookat()
     local class = tangible.getclass(place)
 
     -- if the tangible is not of any class, return empty string.