enable `mojito start` for mojito@"<0.7.0" or mojito + mojito-cli

- change utils-based logging with plain console logging
- try to invoke `mojito start` one of these ways (in order)
  1. mojito-cli installed globally (or somewhere in `module.paths`)
  2. mojito-cli installed locally with the application (`$CWD/node_modules/mojito-cli`)
  3. mojito installed with mojito-shaker (as before)

The resolution of mojito-cli (1 & 2) can be simplified if mojito-shaker declares mojito-cli as a devDependency, which will require mojito@0.7.0 or greater. I hesitated to do that in this PR, but if/when that's ok I can do another PR.

Thanks.