change headers ("flexible rapid"; webpage)

pub/src/axis.cpp

pub/src/calc.cpp

pub/src/coord.cpp

pub/src/curve.cpp

pub/src/curve.h

pub/src/dualplot.cpp

pub/src/edif.cpp

pub/src/expr.cpp

pub/src/file_in.cpp

pub/src/file_out.cpp

pub/src/frida2.cpp

pub/src/func.cpp

pub/src/list.cpp

pub/src/list.h

pub/src/manip.cpp

pub/src/mem.cpp

pub/src/mem.h

pub/src/mystd.cpp

pub/src/olf.cpp

pub/src/olf.h