Add batch selection method options - such as slide in space

[Chronocook]

Currently randomly samples the space, convolutions would be really cool
What would be SUPER cool is if the visualizations showed the convolutions it was training on by highlighting a box or something

[Chronocook]

Coded up a sloppy version of this, it's working, and understood its first smiley face

[Chronocook]

Rewording this to "batch selection"