Pcbnew: added: SVG plotter. Need refinements, but works.

Mainly to plot drill maps, but can be used to plot boards, for documentation.
The print svg still exists, but the plot SVG has more options (mirroring, holes in pads),
however  print svg allows color print, and full board printing, and plot does not.

common/class_plotter.cpp

@@ -9,7 +9,7 @@
  * POSTSCRIPT
  * GERBER
  * DXF
- * an SVG 'plot' is also provided along with the 'print' function by wx, but 
+ * an SVG 'plot' is also provided along with the 'print' function by wx, but
  * is not handled here.
  */
 
@@ -29,11 +29,11 @@ PLOTTER::PLOTTER( )
 {
     plotScale = 1;
     defaultPenWidth = 0;
-    currentPenWidth = -1;       // To-be-set marker 
+    currentPenWidth = -1;       // To-be-set marker
     penState = 'Z';             // End-of-path idle
-    plotMirror = 0;    		// Mirror flag 
+    plotMirror = false;    		// Mirror flag
     outputFile = 0;
-    colorMode = false;          // Starts as a BW plot 
+    colorMode = false;          // Starts as a BW plot
     negativeMode = false;
 }
 
@@ -53,7 +53,7 @@ DPOINT PLOTTER::userToDeviceCoordinates( const wxPoint& pos )
     else
         y = ( paperSize.y - ( pos.y - plotOffset.y )
 	      * plotScale ) * iuPerDeviceUnit ;
-    return DPOINT( x, y );		
+    return DPOINT( x, y );
 }
 
 /**
@@ -76,14 +76,14 @@ double PLOTTER::userToDeviceSize( double size )
 }
 
 
-/** 
- * Generic fallback: arc rendered as a polyline 
+/**
+ * Generic fallback: arc rendered as a polyline
  */
 void PLOTTER::Arc( const wxPoint& centre, int StAngle, int EndAngle, int radius,
                    FILL_T fill, int width )
 {
     wxPoint   start, end;
-    const int delta = 50;   // increment (in 0.1 degrees) to draw circles 
+    const int delta = 50;   // increment (in 0.1 degrees) to draw circles
     double    alpha;
 
     if( StAngle > EndAngle )
@@ -112,7 +112,7 @@ void PLOTTER::Arc( const wxPoint& centre, int StAngle, int EndAngle, int radius,
 /**
  * Fallback: if it doesn't handle bitmaps, we plot a rectangle
  */
-void PLOTTER::PlotImage(const wxImage & aImage, const wxPoint& aPos, 
+void PLOTTER::PlotImage(const wxImage & aImage, const wxPoint& aPos,
                         double aScaleFactor )
 {
     wxSize size( aImage.GetWidth() * aScaleFactor,
@@ -236,7 +236,7 @@ void PLOTTER::markerVBar( const wxPoint& pos, int radius )
 void PLOTTER::Marker( const wxPoint& position, int diametre, unsigned aShapeId )
 {
     int radius = diametre / 2;
-    /* Marker are composed by a series of 'parts' superimposed; not every 
+    /* Marker are composed by a series of 'parts' superimposed; not every
        combination make sense, obviously. Since they are used in order I
        tried to keep the uglier/more complex constructions at the end.
        Also I avoided the |/ |\ -/ -\ construction because they're *very*
@@ -245,7 +245,7 @@ void PLOTTER::Marker( const wxPoint& position, int diametre, unsigned aShapeId )
        If Visual C++ supported the 0b literals they would be optimally
        and easily encoded as an integer array. We have to do with octal */
     static const unsigned char marker_patterns[MARKER_COUNT] = {
-	// Bit order:  O Square Lozenge - | \ / 
+	// Bit order:  O Square Lozenge - | \ /
 	// First choice: simple shapes
 	0003,  // X
 	0100,  // O
@@ -316,32 +316,32 @@ void PLOTTER::Marker( const wxPoint& position, int diametre, unsigned aShapeId )
     {
 	// Fallback shape
 	markerCircle( position, radius );
-    } 
-    else 
+    }
+    else
     {
 	// Decode the pattern and draw the corresponding parts
 	unsigned char pat = marker_patterns[aShapeId];
-	if( pat & 0001 ) 
-	    markerSlash( position, radius );   
-	if( pat & 0002 ) 
-	    markerBackSlash( position, radius );   
-	if( pat & 0004 ) 
-	    markerVBar( position, radius );   
-	if( pat & 0010 ) 
-	    markerHBar( position, radius );   
-	if( pat & 0020 ) 
-	    markerLozenge( position, radius );   
-	if( pat & 0040 ) 
-	    markerSquare( position, radius );   
-	if( pat & 0100 ) 
-	    markerCircle( position, radius );   
+	if( pat & 0001 )
+	    markerSlash( position, radius );
+	if( pat & 0002 )
+	    markerBackSlash( position, radius );
+	if( pat & 0004 )
+	    markerVBar( position, radius );
+	if( pat & 0010 )
+	    markerHBar( position, radius );
+	if( pat & 0020 )
+	    markerLozenge( position, radius );
+	if( pat & 0040 )
+	    markerSquare( position, radius );
+	if( pat & 0100 )
+	    markerCircle( position, radius );
     }
 
 }
 
 
 /**
- * Convert a thick segment and plot it as an oval 
+ * Convert a thick segment and plot it as an oval
  */
 void PLOTTER::segmentAsOval( const wxPoint& start, const wxPoint& end, int width,
                              EDA_DRAW_MODE_T tracemode )