Update for using a proxy model: prevent accessing the model by model() and doing...

Update for using a proxy model: prevent accessing the model by model() and doing a cast do KDirModel afterwards. Instead the access to the KDirModel is done by a member variable. Still the proxy model does not seem to work and leads to a crash as soon as the QListView should work with the proxy model -> in the meantime in line 112 from DolphinView.cpp the KDirModel is used instead of the proxy model.

svn path=/trunk/playground/utils/dolphin/; revision=613768