Support for pysqlcipher3
The sqlcipher_ext in playhouse uses pysqlcipher, which is only compatible with Python 2.7.x.
David Riggleman recently forked this module to work with both Python 2 + 3: https://github.com/rigglemania/pysqlcipher3

It would be great if peewee used this module to be able to work with encrypted databases in Python 3.
