Flux Feature Parity

[avik-pal]

• Convolution
  • ConvTranspose See Add More Layers #163
  • CrossCor See Add More Layers #163
• PixelShuffle See Add More Layers #163
• General Purpose
  • Maxout See Add More Layers #163
  • Bilinear See Add More Layers #163
  • Embedding See Add More Layers #163
  • AlphaDropout See Add InstanceNorm and AlphaDropout #181
• Normalization
  • LayerNorm See Layer Normalization Implementation #127
  • InstanceNorm See Add InstanceNorm and AlphaDropout #181
• Port tests over from Flux

[avik-pal]

Even thought all the initial missing layers have been added, I am keeping this open to track any other missing features that users want.