v0.4.0

• onLoggedIn, onLoginPending and onLogout callbacks are now passed in the ElvenJS.init() function. This unifies it and helps in synchronizing the WalletConnect actions. In the future probably also Ledger integration will be simpler because of that.
• added a smart contract query (for now, without result parsing tools, it will probably be a separate library, you can still parse the result manually for simple data types like string or number, check the example/index.html)
• exported AddressValue
• example demo updates (example demo)