[c-nsp] IOS-XR 5.3.3 add Yang Models

[James Bensley]

Hi,

You can use these to generate nice data:

https://github.com/mbj4668/pyang
https://github.com/robshakir/pyangbind

and bastardise this to push/pull from devices:

https://github.com/ncclient/ncclient

Cheers,
James.