Spin off Apache Shindig 2.5.0-beta5 release with critical fixes

[Henry Saputra]

Hi Ryan or Paul,

With Dan's reverting changes to improvement for oauthpopup (this will
fix OAuth 1.0a flow for three legged dance) and Paul changes to fix
Caja security vulnerability, could one of you help preparing
2.5.0-beta5 release?


Thanks,

- Henry