This changes how we wait for web3 and accounts to be available and
renames web3Provider to ethProvider as we could be able to swap the
different providers (ethers.js vs. web3)
the web3 we are using is old and everything will change with web3 1.0
which is currently in beta for ages.
ethers.js seems to be a bit more lightweight and implements pretty much
the same API so let's give it a try.
bumi
fsmanuel
basti