cf v6 beta2

This updated beta is for Cloud Foundry release 152 and up.

Changes:

• many bug fixes and general flushing out of command options.
• list commands such as gcf orgs now handle paginated api responses
• Manifests: setting basic fields on a single application is now supported via a feature flag. Set the env var CF_MANIFEST=true to enable manifests. Once support for manifests is complete, this will no longer be necessary.