GitLab

Clean up input embeddings resizing and weights tying

Patched an issue relating to the tied weights I had introduced with the TorchScript addition.
Byte order mark management in TSV glue reading.

Sphinx doc, XLM Checkpoints

Working GLUE Example for XLNet (STS-B) 

Fixed file extensions for config/vocab/merges of XLM models.

Fixed all links. Removed TPU. Changed CLI to Converting TF models. Many minor formatting adjustments. Added "TODO Lysandre filled" where necessary.