KTutorial

KTutorial 0.4 changes:
-Editor
  -Support for saving and loading a tutorial
  -Undo/redo for every edition action
  -Use editor support module in KTutorial library to provide several features
    -Choose an object from a target application
    -Text completion for object, signal and event names
    -Test a tutorial in the target application
  -Add tutorials about how to
    -Create a tutorial
    -Interact with the target application
  -Several minor fixes

-Library
  -Editor support module to provide introspection of applications, thus easing
   the design of tutorials
  -Widget highlighting, so widgets can be linked from the text of a step and
   highlighted when the link is activated
  -Add WaitForWindow to wait for windows or dialogs to be shown
  -Fix the tutorial floating widget getting blocked by modal dialogs
  -Several minor fixes