Support for running multiple clients for glados-audit about glados

[pipermerriam]

Ok, I think I know how I want to do this.

first, I'd like to implement the ability to do

• --portal-client http://127.0.0.1:8545
• --portal-client ipc:////path/to/portal_jsonrpc.ipc

And on the rust side, it would be nice to be able to do something like:

HistoryClient::from(portal_client_url)

Then we need a small abstraction of some kind to allow us to "pool" multiple client such that we can use them like a connection pool.

[KolbyML]

#110 closes this