Add imdb_sample recipe

[Chandu-4444]

Hey, I tried to add the imdb_sample recipe to Tabular Datasets. Also, I added the correct hash value for the dataset to download.
Ref: #153

Umm... Are there any plans to make a /text folder (like fastai has) to put all the code related to text?

[lorenzoh]

Looks good to me!

Umm... Are there any plans to make a /text folder (like fastai has) to put all the code related to text?

So I recently factored out all the vision- and tabular- related functionality into submodules Vision and Tabular. FastAI.jl doesn't yet have support for NLP tasks (though it could be integrated with the JuliaText ecosystem and Transformers.jl) so there hasn't been the need for a specific submodule yet.