Introduce random noise to prevent bots

[bakape]

Ideas:

• wave wrapping
• odd line color removal
• random noise
• perlin noise
• "lmao dude just flip the image"

[bakape]

Better idea: port techniques used in https://github.com/aleju/imgaug to C++ Filter candidates:

• [ ] Perspective transform
• [ ] Add
• [ ] Multiply
• [ ] Additive gaussian noise
• [ ] Superpixels
• [x] Horizontal flip
• [ ] Contrast normalization
• [ ] Elastic transformation
• [ ] Alpha with edge detect
• [x] Blur
• [x] Shuffle the filters randomly
• [x] Swapping of source and destination matrix best done with cv::swap(). Can use that to always keep the result in the destination matrix after the first modification.

[Chiiruno]

Related #30