Microsoft.SharePoint.Client has no reference to SharePointOnlineCredentials

Hello All,

I have started trying some very basic customisations to SP, however the Microsoft.SharePoint.Client dll the SharePoint Client Components includes, doesn't have any reference to SharePointOnlineCredentials, so I cannot authenticate to my SharePoint site through a web app!

All download links point to SharePoint 2010 Foundation Server, is there a separate distributable for 2013? I should note that, this class is also not included in this other recommended download (http://www.microsoft.com/en-us/download/details.aspx?id=35585) 

More than likely I've forgotten something, but it does seem to be hard to find the most up-to-date dlls!