v0.2.0 - Added JIT support

What's Changed

Used numba to add support for a JIT compiled minhash implimentation. See minlizhash.jit for more details. Approximately a ~70x speedup using the normal Hasher.sign_documents() interface. About twice that if going directly from array to array.

Uses a custom implimentation of FNV-1a to calculate hashes instead of the default xxhash. Simply set jit = True and it should work (or pass in jit.DocumentSignerJIT instead).

Also made the progress bar optional.

@lizdotsh in #8
Full Changelog: https://github.com/lizdotsh/minlizhash/commits/v0.2.0