- fixed url in add_mesh_gemstones.py, the page existed 

- created pages with a gentle "to-be-written" warning where needed
  and fixed urls in:
  - add_mesh_archimedean_solids.py
  - io_mesh_stl/__init__.py

  See:
  http://wiki.blender.org/index.php/Extensions:2.5/Py/Scripts/Add_Mesh/Archimedean_Solids
  http://wiki.blender.org/index.php/Extensions:2.5/Py/Scripts/Mesh/Surface_Sketch
  http://wiki.blender.org/index.php/Extensions:2.5/Py/Scripts/File_I-O/STL
  http://wiki.blender.org/index.php/Extensions:2.5/Py/Scripts/File_I-O/Camera_Animation

Not nice to send people to non-existing pages :)

- removed view alignment in the object creation
- added view alignment through align_matrix in the invoke

- if the 'VIEW' alignment preference is set and the object properties are changed
the object is rotated always to the view alignment of the view when the operator was called.
--> doesn't snap to new view rotation when orbiting around object and changing properties.

* Lots of cleanup of geometry creation code.
* Cleanup of operator parameters.
* Default parameters have been changed to be similar between the two scripts (might still need some work)
* Fix a bug where the "Gem" mesh had normals pointing inward.