Move specialized plotter classes from plotter.h to specific plotter_xx.h

plotter.h contains now only a header common to all plotters.
The code does not actually change, but it allows modifying a specific plotter
without recompiling most of kicad files.

common/plotters/PS_plotter.cpp

@@ -27,16 +27,15 @@
  * @brief Kicad: specialized plotter for PS files format
  */
 
-#include <fctsys.h>
-#include <trigo.h>
+#include <config.h>
 #include <eda_base_frame.h>
 #include <base_struct.h>
-#include <common.h>
-#include <plotter.h>
-#include <macros.h>
 #include <convert_basic_shapes_to_polygon.h>
 #include <math/util.h>      // for KiROUND
 
+#include "plotters_pslike.h"
+
+
 /* Forward declaration of the font width metrics
    (yes extern! this is the way to forward declare variables */
 extern const double hv_widths[256];