add a new setting for `metabot-enabled` which defaults to true and only launch metabot when it's enabled.  also, remove printlns and tidy up logging a bit.
add a new setting for `metabot-enabled` which defaults to true and only launch metabot when it's enabled.  also, remove printlns and tidy up logging a bit.

blueoceanideas/metabase,blueoceanideas/metabase,blueoceanideas/metabase,blueoceanideas/metabase,blueoceanideas/metabase