move Draw_String to drawContext

Fltk/Draw.cpp

Fltk/Draw.h

Fltk/GUI.cpp

Fltk/GUI.h

Fltk/Makefile

Fltk/aboutWindow.cpp

Fltk/clippingWindow.cpp

Fltk/colorbarWindow.cpp

Graphics/Makefile

Graphics/drawAxes.cpp

Graphics/drawContext.cpp

Graphics/drawContext.h

Graphics/drawGeom.cpp

Graphics/drawGlyph.cpp

Graphics/drawGraph2d.cpp

Graphics/drawMesh.cpp

Graphics/drawPost.cpp

Graphics/drawScales.cpp

Plugin/Annotate.cpp

Plugin/CutSphere.cpp