v0.0.15: Documentation, bug fixes and misc improvements

Improvements and bugfixes

• [Docs] Update link to Gradio documentation #206 (@abidlabs)
• Fix title typo (Cliet -> Client) #207 (@cakiki)
• add _from_pretrained hook #159 (@nateraw)
• Add filename option to lfs_track #212 (@LysandreJik)
• Repository fixes #213 (@LysandreJik)
• Repository documentation #214 (@LysandreJik)
• Add datasets filtering and sorting #194 (@lhoestq)
• doc: sync github to spaces #221 (@borisdayma)
• added batch transform documentation & model archive documentation #224 (@philschmid)
• Sync with hf internal #228 (@mishig25)
• Adding batching support for superb #215 (@Narsil)
• Adding SD for superb (speech-classification). #225 (@Narsil)
• Use Hugging Face fork for s3prl #229 (@lewtun)
• Mv interfaces -> widgets/lib/interfaces #227 (@mishig25)
• Tweak to prevent accidental sharing of token #226 (@julien-c)
• Fix CLI-based repo creation #234 (@osanseviero)
• Add proxify util function #235 (@mishig25)