livepeer_cli status print balances should clearly label the unit

[eladmallel]

Updated based on comment by @dob

We should label units for all CLI balances.

[dob]

I don't necessarily disagree, but we should spec this issue a little better because some balances are in ETH/WEI and some in LPT/LPTU. Users input pricing in wei, etc. So we should just be explicit about which balances and which inputs should be in which units.

[eladmallel]

@dob great feedback, thank you! will do.