This whole system is an ecosystem for paying delivered physical goods via Bitcoin with escrow.
The key idea is to package the partial Bitcoin transaction for releasing the funds to the sender in the form of a QR Code. This transaction is completed by the receiver on delivery (and observed by the deliverer) or a trusted third party.
the android "app" client is able to react on multisig:* URIs and pay to multisig addresses.
the server component is able to create multisig addresses and sign paritial transactions using the bitcoinrpc python interface (with some monkey patching)
Apache 2.0 (preliminary)