[Bf-python] Adding objects and scenes refactor

[Willian Padovani Germano]

Hi,

Here's the wiki page, please check it and comment / add your own 
suggestions:

http://mediawiki.blender.org/index.php/BlenderDev/BPythonAPI/ObjectCreationAPI

Note: I also updated a little the layout and info at the parent page, 
but it still needs to be worked on:

http://mediawiki.blender.org/index.php/BlenderDev/DesignIssues

-- 
Willian