Clarifying UniversalDApp's constructor logic

Initial refactoring effort: extract high-level sections into modules

Use better JS source formatting [WIP]

Insert travis build status

Force to include "build" for deployment.

Setting web3 provider when web3 context is toggled

Fix to Persistence Issue

Looking up libraryName instead of contractName

Implement getBalance() for retrieving the account balance

Improving imports

Fixes https://github.com/chriseth/browser-solidity/issues/108