新增整体pro文件，统一生成文件到bin目录

qwtdemo/qwt/qwt_dial_needle.cpp

@@ -13,7 +13,7 @@
 #include "qwt_painter.h"
 #include <qapplication.h>
 #include <qpainter.h>
-
+#include <QPainterPath>
 #if QT_VERSION < 0x040601
 #define qFastSin(x) qSin(x)
 #define qFastCos(x) qCos(x)

qwtdemo/qwt/qwt_graphic.cpp

@@ -16,7 +16,7 @@
 #include <qpixmap.h>
 #include <qpainterpath.h>
 #include <qmath.h>
-
+#include <QPainterPath>
 static bool qwtHasScalablePen( const QPainter *painter )
 {
     const QPen pen = painter->pen();

qwtdemo/qwt/qwt_null_paintdevice.cpp

@@ -10,7 +10,7 @@
 #include "qwt_null_paintdevice.h"
 #include <qpaintengine.h>
 #include <qpixmap.h>
-
+#include <QPainterPath>
 class QwtNullPaintDevice::PrivateData
 {
 public:

qwtdemo/qwt/qwt_painter.h

@@ -17,7 +17,7 @@
 #include <qpen.h>
 #include <qline.h>
 #include <qpalette.h>
-
+#include <QPainterPath>
 class QPainter;
 class QBrush;
 class QColor;

qwtdemo/qwt/qwt_painter_command.h

@@ -15,7 +15,7 @@
 #include <qpixmap.h>
 #include <qimage.h>
 #include <qpolygon.h>
-
+#include <QPainterPath>
 class QPainterPath;
 
 /*!