Some source code refactoring, no real changes.

AMDiS/src/AMDiS_fwd.h

AMDiS/src/AbstractFunction.h

AMDiS/src/AdaptInfo.h

AMDiS/src/AdaptInstationary.h

AMDiS/src/AdaptStationary.h

AMDiS/src/Assembler.h

AMDiS/src/Boundary.h

AMDiS/src/CoarseningManager1d.h

AMDiS/src/CoarseningManager2d.h

AMDiS/src/CoarseningManager3d.h

AMDiS/src/ConditionalEstimator.h

AMDiS/src/ConditionalMarker.h

AMDiS/src/CouplingTimeInterface.h

AMDiS/src/CreatorInterface.h

AMDiS/src/CylinderProject.h

AMDiS/src/DOFAdmin.h

AMDiS/src/DOFContainer.h

AMDiS/src/DOFIndexed.h

AMDiS/src/DOFIterator.h

AMDiS/src/DOFMatrix.h