Can now read and write star particles in single-node mode.

doc/Doxyfile.in

examples/main.c

src/common_io.c

src/common_io.h

src/part.h

src/single_io.c

src/single_io.h

src/space.c

src/space.h

src/stars/Default/star.h

src/stars/Default/star_debug.h

src/stars/Default/star_io.h

src/stars/Default/star_part.h

src/stars_io.h