Remade sprite rendering

Added VertexColor shader flag
Added color sprite attribute
Added VertexStruct_XY_Color(_UV) struct & declaration


Former-commit-id: b664f4520aa55f4502f85f9dedab9b92040a8c16

include/Nazara/Graphics/Enums.hpp

@@ -85,10 +85,11 @@ enum nzShaderFlags
 {
 	nzShaderFlags_None = 0,
 
-	nzShaderFlags_Deferred   = 0x1,
-	nzShaderFlags_Instancing = 0x2,
+	nzShaderFlags_Deferred    = 0x1,
+	nzShaderFlags_Instancing  = 0x2,
+	nzShaderFlags_VertexColor = 0x4,
 
-	nzShaderFlags_Max = nzShaderFlags_Instancing*2-1
+	nzShaderFlags_Max = nzShaderFlags_VertexColor*2-1
 };
 
 #endif // NAZARA_ENUMS_GRAPHICS_HPP