0.6.0-rc3 released, fixes showstopper bug.

[Kapil Thangavelu]

Hi Folks,

Earlier this morning I released 0.6.0-rc3. It fixes two showstopper
issues for the 0.6.0 release. One was a regression introduced in mid
april that causes integrity errors when content was modified in the
portal. The other was the lack of a sqlalchemy version pin to the 0.5
series which resulted in some minor issues with the ddl generation.

cheers,

Kapil