Merge branch 'logger_loader' into 'master'

Makefile.am

configure.ac

doc/Doxyfile.in

examples/main.c

examples/parameter_example.yml

logger/Makefile.am

logger/logger_header.c

logger/logger_header.h

logger/logger_loader_io.c

logger/logger_loader_io.h

logger/logger_logfile.c

logger/logger_logfile.h

logger/logger_particle.c

logger/logger_particle.h

logger/logger_python_wrapper.c

logger/logger_reader.c

logger/logger_reader.h

logger/logger_time.c

logger/logger_time.h

logger/logger_tools.c