Changed convert-Routines in FemLib/FEMEnums.cpp to a consistent behaviour.
Using logog for loging instead of std::cout in Gui/DataView.
Using logog for loging instead of std::cout in Gui/VtkVis.
Init attribute _grid in inializer list of class VtkMeshSource.
Call by (const) reference for argument of VtkStationSource::GetIndexByName().
Using logog for loging instead of std::cout in Gui/Vrpn.
Using logog for loging instead of std::cout in Gui/VtkAct.
Using logog for loging in mainwindow.h
Merge pull request #156 from TomFischer/LogogFemLibAndGui

Introducing logog and some code cleanup.