npm install
Install Truffle
sudo npm install -g truffle
Install Testrpc
sudo npm install -g ethereumjs-testrpc
testrpc
Copy first three addresses to multi_sig/2_deploy_contrcts.js variable "deployer.deploy(MultiSigWallet)". Copy first address to migrations/2_deploy_contracts.js variable "multisig".
truffle compile
truffle migrate
Read truffleframework documentation for more help on build, deployment and interaction with the smart contract.