Patrice Chalin 67ee007fb0 chore(docs build): add flag to control log output level
closes #1823

Gulp targets like `check-deploy` and `serve-and-sync-devguide` are
quite verbose. This PR allows the `dgeni` logging level to be
controlled using the `--dgeni-log` flag. E.g., use `--dgen-log="error"`
to see only errors.

Also sets log level to "error" when gulp is silent
and log level for createShredMapPackage
2016-07-05 23:14:43 -07:00
..