* pkg/log: ability for debug logs
When the debug plugin is enabled all log.Debug calls will print to
standard; if not there are a noop (almost).
The log package wraps some standard log functions as well, so just
replacing "log" with "plugin/pkg/log" should be enough to use this
package.
* docs
* Add docs
* lint
* Test fallthrough to log pkg as well
* simple package - up test coverage
* add other log levels as well
* update docs
