Construct version string properly
Construct version string properly

The version string was constructed before all version information was
determined. By moving it to a slightly later point all information should
be available.

fmilano/mitk,iwegner/MITK,RabadanLab/MITKats,NifTK/MITK,fmilano/mitk,NifTK/MITK,fmilano/mitk,iwegner/MITK,RabadanLab/MITKats,RabadanLab/MITKats,iwegner/MITK,fmilano/mitk,MITK/MITK,iwegner/MITK,NifTK/MITK,NifTK/MITK,MITK/MITK,MITK/MITK,NifTK/MITK,MITK/MITK,RabadanLab/MITKats,fmilano/mitk,MITK/MITK,fmilano/mitk,RabadanLab/MITKats,MITK/MITK,RabadanLab/MITKats,iwegner/MITK,fmilano/mitk,NifTK/MITK,iwegner/MITK