* swap to using openbsd bcrypt

* we should probably call this 3.0

* update tests to handle slight change in behavior, test better

* strip out code we're not using

* define this for linux

* py3 fix

* add a changelog to the readme

* maybe work with windows

* portable endian header, replace swaps, other windows fixes

* handle older windows compilers properly, handle glibc < 2.9, retab

* remove a todo, that's definitely the limit

* make these definitions conditional since some BSDs may already have them

* add $2a$ tests from crypt_blowfish-1.3

* update readme to note supported prefixes

* almost pointless commit

* add support for $2y$

test vectors from openwall crypt-blowfish1.3