Fix wiki pages and add relevant attachments where applicable

[phdmakk]

Use proper formatting on the Wiki pages, especially the development documentation.

   This is code..
      Properly indented 
   and formatted

This is a Level 0 heading

This is a Level 0 heading

etc.

This allows for using other facilities of Trac that rely on such formatting, such as Table of Contents, PDF export, etc.

Attach and include screenshots where applicable (attachment permissions have been fixed). Attach other documents where applicable as well (although they should preferably be added to SVN and then linked accordingly which makes management bearable).