Update API documentation for javascript client

[taythebot]

I just started using bcoin and had a bit of trouble figuring out how to set a remote host for the bclient library. It doesn't seem to be in documented at all.

This might be useful for new comers. I didn't see any other way to suggest an edit on the documentation so I'm submitting an issue here. If there is a better place please let me know!

URL: https://bcoin.io/api-docs/index.html#using-javascript-clients
Suggested Edit:

Config	Type	Required	Description
network	string	true	Network to use: main, testnet, regtest
host	string	false	Host for API (Defaults to 127.0.0.1)
port	int	true	bcoin socket port (specific for each network)
apiKey	string	true	API secret

[pinheadmz]

Thanks @defusevenue !

In the future you can open a PR here: https://github.com/bcoin-org/bcoin-org.github.io

I'll fix this one today.