- 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

-small cleanup

* New category: 'Import/Export'

now in the Object category.
*note this cleans Add_Mesh so only add_mesh scripts are in that category.
part of add mesh clean up for adding recall function.

* Cleanup up some PEP8 stuff.

* Renamed image_to_planes() to planes_from_images()
* Fixed some strange code that overwrote extList.

* Fixed "url" and "descrioption" in bl_addon_info
* Made this into a "Add Mesh" script (not "Object"), since that is what it does.
* Renamed some internal functions to make it easier to guess their functionality.
* Reformatted the code a bit and updated/fixed some comments.

-added missing mesh_update and select/active states

script is good to go.

[[Split portion of a mixed commit.]]