Allow specific input shape

[doomedramen]

Currently it assumes the input layer is 1x1xINPUT_LENGTH.
This does not support 2D or 3D inputs, my changes allow the user to specify the shape.

[doomedramen]

This could also be achieved by getting the X,Y,Z sizes from the input data:

layer_defs.push({type: 'input', out_sx: this.data[0].sx:, out_sy: this.data[0].sy, out_depth:this.data[0].depth});

this is currently hard coded to:

layer_defs.push({type: 'input', out_sx: 1, out_sy: 1, out_depth: input_depth});

[TrevorBlythe]

It works the same either way bruh.

[371148606]

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