Merge branch 'cleanup_header' into 'master'

src/Makefile.am

src/header.cpp

src/header.hpp

src/logfile.cpp

src/logfile.hpp

src/mapped_file.cpp

src/mapped_file.hpp

src/mapped_logfile.cpp

src/mapped_logfile.hpp

src/particle.hpp

src/particle_type.hpp

src/python_wrapper.cpp

src/reader.cpp

src/reader_generate_index.cpp

src/time_array.hpp

src/tools.cpp

src/tools.hpp

tests/testLogfileHeader.cpp

tests/testLogfileReader.cpp

tests/testVirtualReality.cpp