Feature: Advanced Entropy

[MShwed]

Addresses #453

Adds entropy visualizations:

• Image
• Curve
• Histogram (Line)
• Histogram (Bar)

I moved this to a separate operation but this could easily be added to the existing "Entropy" operation.
Each of these visualizations could also be their own operation with associated arguments for customization.

For large files when the operation returns an svg, the input/output threshold would need to be increased by the user otherwise the Dish _translate function attempts to escape html content when converting data to an intermediate buffer leaving the output file 0 bytes.

I'm open to adding other visualizations or re-working current ones if need be.

Samples

Image

Curve

Histogram (Line)

Histogram (Bar)

[n1474335]

This is brilliant. I think this should be added to the current 'Entropy' operation though, rather than being a separate op.

[MShwed]

Awesome, I moved this under the 'Entropy' Operation. The previous behaviour is preserved under the 'Shannon' visualization

[n1474335]

Great stuff, thanks very much. I made a few improvements to the efficiency so this can now process large files significantly faster. The visualisations are really nice.