Here s my submission for the bounty, using DSteem:
https://steemit.com/utopian-io/@stoodkev/how-to-set-up-and-use-multisignature-accounts-on-steem-blockchain .
I used the @multisig account to create the example.
If I do get the bounty, I will distribute most of it to projects on Fundition and the rest to other deserving Steemians.

If there is sufficient interest, I ll organize the code and push it to Github.