Updates to quantization related files, index.rst, and javadocs (#27676)
Summary:
- Update torch.rst to remove certain autofunction calls
- Add reference to Quantization Functions section in nn.rst
- Update javadocs for v1.3.0
- Update index.rst:
- Update "Package Reference" to "Python API"
- Add in torchaudio and torchtext reference links so they show up across all docs not just the main page
- Add "Other Languages" section, add in C++ docs, add in Javadocs
- Add link to XLA docs under Notes: http://pytorch.org/xla/
Pull Request resolved: https://github.com/pytorch/pytorch/pull/27676
Differential Revision: D17850696
Pulled By: brianjo
fbshipit-source-id: 3de146f065222d1acd9a33aae3b543927a63532a
