added tracker URL to info

changed skelegon up-vector to bone roll conversion, should better match now
switch to Object mode before adding meshes/armatures, prevents new bones from being added into the currently edited armature

io_import_scene_lwo.py

@@ -29,7 +29,8 @@ bl_addon_info= {
     "warning": "",
     "wiki_url": "http://wiki.blender.org/index.php/Extensions:2.5/Py/"\
         "Scripts/File_I-O/LightWave_Object",
-    "tracker_url": "",
+    "tracker_url": "https://projects.blender.org/tracker/index.php?"\
+        "func=detail&aid=23623&group_id=153&atid=469",
     "category": "Import/Export"}
 
 # Copyright (c) Ken Nign 2010
@@ -967,13 +968,12 @@ def build_armature(layer_data, bones):
 
         if skb_idx in layer_data.bone_rolls:
             xyz= layer_data.bone_rolls[skb_idx].split(' ')
-            vec= mathutils.Vector()
-            vec.x= float(xyz[0])
-            vec.y= float(xyz[1])
-            vec.z= float(xyz[2])
+            vec= mathutils.Vector((float(xyz[0]), float(xyz[1]), float(xyz[2])))
             quat= vec.to_track_quat('Y', 'Z')
-            nb.roll= quat.to_euler('XYZ')[2] * -1
-            # XXX: This code may need a second look and test.
+            nb.roll= max(quat.to_euler('YZX'))
+            if nb.roll == 0.0:
+                nb.roll= min(quat.to_euler('YZX')) * -1
+            # YZX order seems to produce the correct roll value.
         else:
             nb.roll= 0.0
 
@@ -1018,6 +1018,10 @@ def build_objects(object_layers, object_surfs, object_tags, object_name, add_sub
     else:
         print("Building %d Objects" % len(object_layers))
 
+    # Before adding any meshes or armatures go into Object mode.
+    if bpy.ops.object.mode_set.poll():
+        bpy.ops.object.mode_set(mode='OBJECT')
+
     for layer_data in object_layers:
         me= bpy.data.meshes.new(layer_data.name)
         me.vertices.add(len(layer_data.pnts))