添加：获取ximea温度的函数getTemperature；

Header_Files/irisximeaimager.h

@@ -29,6 +29,7 @@ namespace Iris
         int getSpatialBin();
         void setRoi(int OffsetX, int width, int OffsetY, int height);
         int getBufferSizeOfOneFrame();
+        float getTemperature();
     public:
         float m_fGain;
         float m_fOffset;