Moved IO-related files to new io-directory.

AMDiS/CMakeLists.txt

AMDiS/bin/Makefile.am

AMDiS/src/AMDiS.h

AMDiS/src/Debug.cc

AMDiS/src/Mesh.cc

AMDiS/src/ProblemInstat.cc

AMDiS/src/ProblemScal.cc

AMDiS/src/ProblemVec.cc

AMDiS/src/ProblemVec.h

AMDiS/src/Serializer.h

AMDiS/src/TecPlotWriter.cc

AMDiS/src/TecPlotWriter.h

AMDiS/src/TecPlotWriter.hh

AMDiS/src/io/ArhReader.cc

AMDiS/src/io/ArhReader.h

AMDiS/src/io/ArhWriter.cc

AMDiS/src/io/ArhWriter.h

AMDiS/src/io/DataCollector.cc

AMDiS/src/io/DataCollector.h

AMDiS/src/io/ElementFileWriter.cc