Truffle Ethereum contract tutorial

First turorial of Ethereum contract using Truffle framework

Tutorial URL

https://medium.com/@mvmurthy/full-stack-hello-world-voting-ethereum-dapp-tutorial-part-2-30b3d335aa1f

Observations

1. Change Pragma Solidity version to ^0.4.2
2. Remove ammount of gas from 2_deploy_contracts.js
3. Replace if - throws with require in Voting.sol