Re arranged how modifiers are used.

All settings through Blender.Modifier.Settings
see the epydocs
Also added some error checking to fix some possible segfaults.
Added more epydocs

Modifiers API should be stable enough to use now, though give it a bit of time for testing.

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

@@ -242,7 +242,7 @@ class Object:
         2 - wire, 3 - Solid, 4- Shaded, 5 - Textured.
     @ivar drawMode: The object's drawing mode used. The value can be a sum
         of: 2 - axis, 4 - texspace, 8 - drawname, 16 - drawimage,
-        32 - drawwire.
+        32 - drawwire, 64 - xray.
     @ivar name: The name of the object.
     @ivar sel: The selection state of the object in the current scene, 1 is selected, 0 is unselected. (Selecting makes the object active)
     @ivar effects: The list of particle effects associated with the object.  (Read-only)
@@ -318,6 +318,8 @@ class Object:
     @type DupOff: int
     @ivar drawSize: The drawsize for empty objects. 1.0. is default.
     @type drawSize: float
+    @ivar modifiers: The modifiers for this object.
+    @type modifiers: ModSeq L{Modifier.ModSeq}
   """
 
   def buildParts():
@@ -397,6 +399,7 @@ class Object:
         - 8  - drawname
         - 16 - drawimage
         - 32 - drawwire
+        - 64 - xray
     """
 
   def getDrawType():
@@ -698,6 +701,7 @@ class Object:
         - 8  - drawname
         - 16 - drawimage
         - 32 - drawwire
+        - 64 - xray
     """
 
   def setDrawType(drawtype):