Create layer by shape

[syt123450]

Make TensorSpace's layer can be created by directly given the shape. For example:

let depthwiseConv2d = new TSP.DepthwiseConv2d({
    shape: [28, 28, 32],
    name: "depthwise_1"
});

[syt123450]

For 1d layer, use config:

{
    shape: [ 28 ]
}

For 2d layer, use config:

{
    shape: [ 28, 28 ]
}

For 3d layer, use config:

{
    shape: [ 28, 28, 3 ]
}