Merge branch 'logger_python' into 'master'

configure.ac

logger/Makefile.am

logger/examples/reader_example.py

logger/logger_header.c

logger/logger_index.c

logger/logger_loader_io.c

logger/logger_logfile.c

logger/logger_particle.c

logger/logger_python_wrapper.c

logger/logger_reader.c

logger/logger_time.c

logger/logger_tools.c

logger/logger_tools.h

logger/tests/Makefile.am