Truffle 3

[makoto]

Followed http://truffleframework.com/tutorials/upgrading-from-truffle-2-to-3 + changed any upgraded compiler syntax changes since last Sep.

Contract related

• Set pragma;
• Add ; after _;
• Add payable;
• Fix 'division by zero' error.

Migrations

• Use artifacts to load contract

Configurations

• Add new format of networks on truffle.js
• Add gas and from on truffle.js
• Add truffle-contract on package.json

Frontend

• Use web3.version.getNetwork to get network_id and set the id via contract.setNetwork(network_id).
• Use artifacts to load contract
• Change method chaining way to adopt new style(contract.then over contract.functionCall.then).
• Use Conference.address over Conference.deployed().address

Test

• Use Conference.address over Conference.deployed().address
• Change balanceDiff to round up by 1/10 rather than 1/1000 (did gas price go up?)