message: don't suppress exception messages that come out of the seed loading process
diff: @@ -140,12 +140,17 @@ module.exports = {
  }
  }).filter(Boolean).reduce((a,b) => a.concat(b), []);
  } catch (err) {
  + if (err.code === 'ENOENT') {
  + let message = `@cardstack/hub found no seed model directory (looking for ${seedDir})`;
  if (ui) {
  - ui.writeWarnLine(`Unable to load your seed models (looking for ${seedDir})`);
  + ui.writeWarnLine(message);
  } else {
  - process.stderr.write(`Unable to load your seed models (looking for ${seedDir})\n`);
  + process.stderr.write(message);
  }
  seedModels = [];
  + } else {
  + throw err;
  + }
  }
  // Without this node 7 swallows stack traces within the native
  