Ability to import RCM model between marketo instances

[derelict_wombat]

I'm working on changes to our RCM model and doing testing in our sandbox.  Currently its required to have to rebuild the model in PROD once testing in the sandbox is approved which means i need to revalidate everything again in production to make sure I did not make any errors when re-creating it. 

Would love to be able to import the RCM model from a sandbox or other instance of Marketo.