renamed examples

--HG--
rename : examples/dnn_mnist_advanced_ex.cpp => examples/dnn_introduction2_ex.cpp
rename : examples/dnn_mnist_ex.cpp => examples/dnn_introduction_ex.cpp

examples/CMakeLists.txt

@@ -31,8 +31,8 @@ ENDMACRO()
 
 # The deep learning toolkit requires a C++11 capable compiler.  
 if (COMPILER_CAN_DO_CPP_11)
-   add_example(dnn_mnist_ex)
-   add_example(dnn_mnist_advanced_ex)
+   add_example(dnn_introduction_ex)
+   add_example(dnn_introduction2_ex)
    add_example(dnn_inception_ex)
    add_example(dnn_imagenet_ex)
    add_example(dnn_imagenet_train_ex)