Add increasing levels of verbose logging to ronin-recon run

[postmodern]

First complete issue #132. Then include CommandKit::Options::VerboseLevel into Ronin::Recon::CLI::Commands::Run. Then add additional logging logic based on the verbose level (0, 1, 2, 3, ...) which would setup different engine.on(...) callbacks to print additional events from the engine. Increased verbose levels could allow printing the worker class names that discovered a new value, or when a value "job" begins or is finished being processed by a worker class.