CodonAlign rewording
GSoC attributions
version bump -> 1.64
README for 1.64
removed 2to3.py
simple.dnd include
1.64+ version bump
The Biopython Consortium --> The Biopython Contributors

Discussed on mailing list in context of BOSC talk authorship.
This author description appears on our PyPI page:
https://pypi.python.org/pypi/biopython

See http://lists.open-bio.org/pipermail/biopython-dev/2014-April/011234.html
Correct typo in Biopython 1.64 release date
Use the same code path for SeqUtils.molecular_weigth and ProtParam.molecular_weight

Previously depending on which of these you used, you could get different molecular weights.

Signed-off-by: Kai Blin <kai@samba.org>