Initial release

[hendrikvanantwerpen]

The bpe crate names was released, so I released an initial version of the crate to claim the name.

Things changed:

• Added some fields to the crate manifest.
• Changed the serialization of token dictionaries. The problem was that <crates.io> has a size limit of 10MB, while our serialized BPE instances were around 15MB and 30MB. For now I've opted to serialize the token lists + hash factor, and build the BPE instance in the lazy function. The performance impact of this is only relevant when the values are initialized, which is only once per run. But I'm happy to iterate ont his if necessary.

I decided to go ahead with the release to make sure we got the name. I imagine we do another release soon with additional changes or polishing we think are necessary.