Colors and front-end refactoring

@kilianc there you go,
sorry, I was making changes in main repo., I know that feature branches are not our thing here :)

New javascript files (in `webapp/public/js`) for front-end should go to S3.
what was the behavior for you? I think this is a bug in node core and the `readLine` api. I wasn't able to reproduce with `terminal: false`, but I recall not being able to redirect from `rtail` stdout to file with the `>` operator.

Either way the console.log is not a fix, if we have to, we need to rewrite a line reader, a `stdout.write` not console.log(), it needs to stream.