gerbview: add french translation, G55 command (a do nothing command) and solved a bug that can crashes gerbview with files without any DCODE tools info.

Improved grid implementation, 3D viewer debug assertion fix, moved drawpanel.cpp to common library, and added WinEDA_Appl declaration.

 + Function name on newline
 + All function parameters on newline ( the first on function name line )

Update dutch language

areas can be now filled using solid polygons, or using segments to fill areas inside polygons.

translation of last french comments in dialog_edit_component_in_schematic.cpp, and minor enhancements
Update french dictionnary