Merge branch 'visuForDev' into 'master'

CMakeLists.txt

Common/Context.h

Common/GmshConfig.h.in

Common/Options.cpp

Common/Options.h

Common/VertexArray.cpp

Common/VertexArray.h

Fltk/contextWindow.cpp

Fltk/optionWindow.cpp

Fltk/optionWindow.h

Geo/MElement.cpp

Geo/MElement.h

Geo/MHexahedron.cpp

Geo/MHexahedron.h

Geo/MPrism.cpp

Geo/MPrism.h

Geo/MPyramid.cpp

Geo/MPyramid.h

Geo/MQuadrangle.cpp

Geo/MQuadrangle.h