[cli] Unify debug logging options and allow options in .lamingtonrc to be specified on the command line

[thekevinbrown]

As an extension of #104, it'd be awesome if we could unify our logging options to something like:

• Debug: Outputs information which would help smart contract authors figure out what transactions their tests are sending to EOS. Doesn't output info about Lamington internals or what EOS is doing.
• Verbose: Outputs transactions and what EOS is doing. Doesn't output Lamington internals.
• Trace: Outputs everything to help us debug where Lamington might be breaking on someone's machine.

These should be configurable in .lamingtonrc and overridable via CLI options.

[dallasjohnson]

Changes in #204 may satisfy this issue, although I think it would still show Lamington internals. But otherwise could be closed.