Making classes non-assignable

Following CppCheck recomendation, all classes that should not be manipulated by value are made non-assignable to ensure no mistake is made.

FrameBuffer.h

@@ -24,6 +24,9 @@ public:
 
     FrameBufferImage(int w, int h);
     FrameBufferImage(jpegBuffer jpgimg);
+    // non assignable class
+    FrameBufferImage(FrameBufferImage const&) = delete;
+    FrameBufferImage& operator=(FrameBufferImage const&) = delete;
     ~FrameBufferImage();
 };
 
@@ -45,6 +48,7 @@ public:
 
     FrameBuffer(glm::vec3 resolution, bool useAlpha = false, bool multiSampling = false);
     FrameBuffer(uint width, uint height, bool useAlpha = false, bool multiSampling = false);
+    FrameBuffer(FrameBuffer const&) = delete;
     ~FrameBuffer();
 
     // Bind & push attribs to prepare draw