Pyelliptic

------------------

- Remove ECC part (issue 50)

------------------

- Rewrite ECC key encoding (issue 39)

------------------

- replace EVP_DigestInit and EVP_DigestFinal by *_ex (issue 32)
- SHA256 for sign/verify operations (issue 32)
- fix arithmetic.py (issue 30)

------------------

- Change licence to BSD (issue 24)
- Rewrite test.py with unittest (issue 27)
- Add constant time equality comparison (issue 23)
- add arithmetic.py (pull request 21)
- add some functions in openssl.py (pull request 22)
- raise exception if RAND_bytes failed (pull request 22)

------------------

- Add CHANGES.txt according to pip conventions (issue 19)
- PEP8 (issue 20)
- Relative imports (issue 18)