- added tracker_url to most of the current scripts in release, 
  see http://lists.blender.org/pipermail/bf-blender-cvs/2010-May/028285.html
- apparently missing tracker pages for 2 scripts:
		- io_anim_camera.py
		- io_mesh_stl.py
- wiki links:
	- added link to space_view3d_materials_utils.py
	- conformed link in import_scene_unreal_psk.py

Renamed start to frame_start and end to frame_end for generating particles, so that the cloud gen script works again.

collections like context.selected_objects no longer return None for empty lists. Update scripts for this.
also removed check for obj.data == None for a mesh. This will never happen.

add contrib\py\scripts\addons\space_view3d_multiselect_menu.py
delete contrib\py\scripts\addons\space_view3d_cursor_menu.py
too many conflicts if enabled with dynamic menu & is integrated into Dynamic menu & spacebar menu

[[Split portion of a mixed commit.]]

moved directly to trunk/py/scripts/addons/object_cloud_gen.py