Re: Issue 626 in robotframework: Document different ways to extend existing test libraries

[robotframework]

Updates:
        Owner: janne.t.harkonen
        Cc: jussi.ao.malinen pekka.klarck
Comment #1 on issue 626 by pekka.klarck: Document different ways to extend  
existing test libraries
http://code.google.com/p/robotframework/issues/detail?id=626

Initial version of the new doc committed in r3945. I think most of the  
needed content is there but the text definitely can be improved and I don't  
really like the current subtitles. Janna and/or Jussi, could you proofread  
this?