fix ekzhu#35 results of forest index on weighted minhash is always empty

bump version

update version. update doc website

LSH Ensemble (ekzhu#25)

A slightly modified LSH Ensemble implementation. Update documentations.

update minhash benchmark plot

update serialization interface for lean minhash

Fix MinHash serialization bug ekzhu#18. (ekzhu#23)

* remove minhash serializtion override and give it to lean minhash

* add note in docs

* add reference to ekzhu#18

* update some metadata

fix typo in plot

fix typo in plot

fix windows Python int bug (ekzhu#4) and use Python build-in random n…

…umber generator