KTutorial 0.5 released!

KTutorial 0.5 changes:
-Editor
-Editor for semantic markup
-Optional filtering of remote objects if their name is empty or they are not widgets
-Support to test a tutorial from a specific step instead of the start step
-Several minor fixes

-Library
-Add WaitForStepActivation to wait for steps to be activated
-Add WaitForProperty to wait for a property to have a specific value
-Improve finding objects by supporting composed names and applying ambiguity solving rules
-Add C++ interface for the applications to optionally provide their own user interface for the library
-Version support in FindKTutorial CMake module
-Include every library class in "ktutorial" namespace
-Several minor fixes