converted MOST functions names to underscore style

pub/CMakeLists.txt.user

pub/lib/calc.cpp

pub/lib/calc.hpp

pub/lib/commands.cpp

pub/lib/commands.hpp

pub/lib/curve.cpp

pub/lib/edif.cpp

pub/lib/file_in.cpp

pub/lib/fit.cpp

pub/lib/manip.cpp

pub/lib/manip.hpp

pub/lib/olf.cpp

pub/lib/olf.hpp

pub/lib/plot.cpp

pub/lib/plot.hpp

pub/lib/rssm.cpp

pub/lib/rssm.hpp

pub/lib/toplevel.cpp

pub/lib/var.cpp

pub/lib/var.hpp