ENYO-3012: bad asset path after deploying a non-Bootplate-like Enyo application

* ENYO-3012: be more explicit about folders creation during verbose execution (HEAD, enyojs/ENYO-3012, ENYO-3012)
* ENYO-3012: (less) fix case where `package.js` deep (>1) in the source tree
* ENYO-3012: fix interaction between `-s` & `-p` + use `packagejs:` in `deploy.json`

Enyo-DCO-1.1-Signed-off-by: Francois-Xavier KOWALSKI <francois-xavier.kowalski@hp.com>