[pypy-dev] Release 5.0.0

[Matti Picus]

Pre-release bundles are up on the buildbot,
http://buildbot.pypy.org/nightly/release-5.x
please test them out. There are still a few last touches pending, but it 
would be nice to have some preliminary indication whether the bundles 
work in real-life work loads and bugs that we claim we fixed since 4.0.1 
actually do not reappear.

Also the release notice is up at
https://bitbucket.org/pypy/pypy/src/default/pypy/doc/release-5.0.0.rst
Any help with it would be appreciated
Matti