Pybloomfiltermmap3

Changes
^^^^^^^
- Add :meth:`BloomFilter.bit_array` property for bit vector representation
- Add :meth:`BloomFilter.filename` property and issue a PendingDeprecationWarning when using :meth:`BloomFilter.name`
- Do memset after initializing BloomFilter instance to set alignment bytes to 0 prior to populating the filter (see notes in 24)
- Remove ``mode`` parameter from :meth:`BloomFilter.from_base64` method introduced in 0.5.0 as part of a refactoring (see notes in 23)
- Add explicit flag to build using Cython when building or installing a package; setup looks for a bundled Cython
source by default (included in the PyPI distribution package)

Changes
^^^^^^^
- Add support for read-only Bloom filter files
- Add customization of hash seeds for hashing algorithms
- Drop Python < 3.5 support

Changes
^^^^^^^
- Ensure that filename is encoded in :meth:`~pybloomfilter.BloomFilter.copy_template` (thanks `gonzalezzfelipe <gonzalezzfelipe_>`_!)

Fixes
^^^^^
- Fix missing Cython dependency in setup.py

Fixes
^^^^^
- PyPi wants ``long_description`` and its type

Fixes
^^^^^
- Fix read / write of base64 encoded filter files (thanks `gaetano-guerriero <gaetano-guerriero_>`_!)