Logger: make filename more specific

logger/Makefile.am

logger/logger_header.c

logger/logger_header.h

logger/logger_io.c

logger/logger_io.h

logger/logger_particle.c

logger/logger_particle.h

logger/logger_python_wrapper.c

logger/logger_time.c

logger/logger_time.h

logger/logger_tools.c

logger/python/reader_example.py