Lots of updates

• add originator for login_with_password
• new API: VM.import
• new CLI: VM import from URL
• initial support for thin provisioning on block storage
• lots of VGPU improvements
• allow storage motion of halted VMs
• support for TLS 1.2
• initial support for FCoE
• preliminary support for SMAPIv3
• preliminary support for multiple cluster stacks
• new CLI support for reading database dumps