Release version 0.3.7

Using numpy in place of popcount

Converting popcount to numpy bitwise_count

Converting popcount to numpy bitwise_count

Release v0.3.3

* adding batch_size option to rank()

Release v0.3.2

* add option to return duplicate indices in deduplicate() function, rather than list of docs

Release v0.3.1

* vector similarity refactor into cython for cross import
* refact deduplication for performance
* added sort=True|False option to rank()

Release v0.3.0

* vector similarity refactor into cython for cross import
* refact deduplication for performance
* added sort=True|False option to rank()

Merge pull request #31 from dleemiller/fix-deduplicate

shape check before equality comparison

Update README.md