add more methods to remix-sim; fix accounts

[iurimatias]

No description provided.

[yann300]

is that enough for adding balance here?
I think we might need to do something like https://github.com/ethereum/remix-ide/blob/swap_it/src/universal-dapp.js#L127

[iurimatias]

The api changed afak

[yann300]

but this call stateManager.putAccount is still needed no?

[iurimatias]

turns out it's not needed anymore. getAccount will return the account object which can be modified. a way to verify this is to run a script like

const Web3 = require('web3')
const RemixSim = require('./')

provider = new RemixSim.Provider({})
web3 = new Web3(provider)

web3.eth.getAccounts((error, accounts) => {
  let account = accounts[0]

  web3.eth.getBalance(account).then((balance) => {
    console.dir("=============")
    console.dir(balance)
    console.dir("=============")
  })
});

balance will have the value of var balance = '0x56BC75E2D63100000' changing this will the balance returned above