rc1 sessions

Hi,

i was wondering if the rc1 version of sessions is released yet? as i can see it in the reference list when trying to add it but when trying to add it i get the following output error:-

Unable to locate Dependency Microsoft.AspNet.Session >= 1.0.0-rc1-final

but i can add beta 8 just not the rc version,

i am trying to add the following to the project.json file under dependencies:-

"Microsoft.AspNet.Session": "1.0.0-rc1-final"

Kind regards,

David