more func naming uniformization

Common/Colors.h

Common/CommandLine.cpp

Common/CommandLine.h

Common/CreateFile.cpp

Common/Gmsh.cpp

Common/GmshMessage.cpp

Common/Main.cpp

Common/Options.cpp

Common/Options.h

Fltk/Main.cpp

Fltk/aboutWindow.cpp

Fltk/fileDialogs.cpp

Fltk/graphicWindow.cpp

Fltk/menuWindow.cpp

Fltk/optionWindow.cpp

Geo/Makefile

Mesh/Makefile

Numeric/Makefile

Parser/Gmsh.tab.cpp

Parser/Gmsh.y