[feature] new img container support BMP 24-16 bit

[Hanyonggong]

New img container support BMP 24-16 bit

• suport BMP 24 bit
• suport BMP 16 bit (two format：RGB565 and RGB 555)

All have passed the Lenet model test

[LiuYang328]

I test 32, 24, 16 bit BMP in MobileNet example, it can compiled but the result of the calculation is wrong.
If i use opencv version container, the input is "dog.png", the result is "Samoyed", this is right, but the new container results "drake"

the opencv result:

the new container result:

[Hanyonggong]

@LiuYang328 This may be not a problem with the new container, maybe it's because no resizing after using new container

[LiuYang328]

@LiuYang328 This may be not a problem with the new container, maybe it's because no resizing after using new container

The input is already resized, the bmp file both 224*224

[Hanyonggong]

@LiuYang328 This may be not a problem with the new container, maybe it's because no resizing after using new container

The input is already resized, the bmp file both 224*224

You can compare the differences between them, such as shape, it can work normally on my end