I don't want to discourage the community from taking this on. I don't have any plans to tackle this, specifically. Besides, I'm not up to speed on how the other languages handle it. I have documented ruby specific aspects of this here:
https://github.com/steemit/steem-ruby#multisig
But this assumes you've already established the account, which I have not documented anywhere.
I'm extremely curious to see if a bounty is actionable by the community. If so, this will be a great pattern.