[security] use a stronger encryption algorythm for password, keeping bw compat
Administrator should ask their users to reenter new password so they
benefit from the new encryption.
Also, new encryption is cross-platform compatible, eg you may now move an instance
from windows to linux painlessly
debian/tmp/usr/lib/PY_VERSION/site-packages/cubicweb/entities/ usr/lib/PY_VERSION/site-packages/cubicweb
debian/tmp/usr/lib/PY_VERSION/site-packages/cubicweb/ext/ usr/lib/PY_VERSION/site-packages/cubicweb
debian/tmp/usr/share/cubicweb/cubes/ usr/share/cubicweb/
debian/tmp/usr/lib/PY_VERSION/site-packages/cubicweb/*.py usr/share/pyshared/cubicweb