Adding custom Datapoints to canvas.

[avnerkhan]

You can now add custom datapoints to the canvas by clicking and dragging along the image. Has a couple of radio buttons to select which color datapoint you would like to add. This only works in Classification mode. On Regression mode, the app works the same and the radio buttons are hidden. The radio buttons can also be hidden via the checkbox section. The new custom datapoints are processed by the neural network when the algorithm is run.

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