Add Weight Normalization Keras Wrapper

[aadya940]

Related to #1714.

Implements the weight normalization algorithm as a wrapper rather than a layer.

[aadya940]

@hadifawaz1999

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[aadya940]

This was the deprecated layer right? If there's any reused code I would link to the old package and acknowledge that even if it's gone. If it's all original, then no problem.

The implementation is original, hence no need to link to the old package.

[MatthewMiddlehurst]

Fine by me then. Will give it a bit more for @hadifawaz1999 to have a check over and put it in if theres nothing.

[aadya940]

Great Addition !! Do you think we can use it for the dilated cnn in deep clustering ?

@hadifawaz1999 Yes it should, since the only difference is a couple of zeros in the kernel. Added it in the test.