Bert train fix#16

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hammad001 wants to merge 3 commits intorowanz:masterfrom

hammad001:bert-train-fix

Commits on Mar 4, 2019

Included bert embeddings and json in gitignore
hammad001
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Commits on Mar 5, 2019

1. Changed saved model paths in eval file. \n 2. Included condition not to convert metadata to gpu.
hammad001
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Commits on Mar 13, 2019

Changed tf constants to tf placeholders. Added session hooks.
hammad001
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