BPython bug fixes:

- bug #2033 reported by Ken Hughes: Vertices of mesh parented to lattice is scaled incorrectly:
https://projects.blender.org/tracker/?func=detail&aid=2033&group_id=9&atid=125

- bug #2211 reported by German Alonso Tamayo (servivo): Add a vertex to a mesh with groups using a script and then edit that mesh hangs blender:
https://projects.blender.org/tracker/index.php?func=detail&aid=2211&group_id=9&atid=125

(#2211's hang was already fixed with previous commit, but this way should work better)

- doc updates (Ken reported missing info about Render slinks, thanks).

source/blender/python/api2_2x/doc/World.py

@@ -293,7 +293,7 @@ class World:
     """
     Get a list with this World's script links of type 'event'.
     @type event: string
-    @param event: "FrameChanged" or "Redraw".
+    @param event: "FrameChanged", "Redraw", "Render".
     @rtype: list
     @return: a list with Blender L{Text} names (the script links of the given
         'event' type) or None if there are no script links at all.
@@ -313,7 +313,7 @@ class World:
     @type text: string
     @param text: the name of an existing Blender L{Text}.
     @type event: string
-    @param event: "FrameChanged" or "Redraw".
+    @param event: "FrameChanged", "Redraw" or "Render".
     """
   
   def setCurrent ():