Add MIB support for Nimble Storage

I would love to see Nimble MIB's added - My devices have SNMP enabled and I can get some really basic information from them, but not enough.
Within Observium they show up as "Generic Device"

Nimble Storage is now one of the top players in the iSCSI enterprise storage arena so I think it would be massively beneficial to Observium to add the correct MIB's