renamed .h -> .hpp

pub/src/Makefile.am

pub/src/Makefile.in

pub/src/axis.cpp

pub/src/axis.hpp

pub/src/calc.cpp

pub/src/calc.hpp

pub/src/commands.cpp

pub/src/commands.hpp

pub/src/coord.cpp

pub/src/coord.hpp

pub/src/curve.cpp

pub/src/curve.hpp

pub/src/defs.hpp

pub/src/dualplot.cpp

pub/src/dualplot.hpp

pub/src/edif.cpp

pub/src/edif.hpp

pub/src/expr.cpp

pub/src/expr.hpp

pub/src/file_in.cpp