ENYO-1740: after run of `npm rebuild`

Enyo-DCO-1.1-Signed-off-by: Francois-Xavier KOWALSKI <francois-xavier.kowalski@hp.com>
ENYO-1740: update dropbox-js from 0.3.5 to 0.8.1

- From https://github.com/dropbox/dropbox-js, install using npm
- 0.8.1 is written in CoffeScript:  ARES uses only the compiled version

Enyo-DCO-1.1-Signed-off-by: Francois-Xavier KOWALSKI <francois-xavier.kowalski@hp.com>
ENYO-1740, ENYO-1884: switch fsDropbox from manual to `dropbox-js` library

- `fsdropbox-js` was the method used by former Hermes implementation to
  access Dropbox, although it was an old & deprecated version of this
  library.
- The functional status of the Dropbox integration remains the same
  (only Ares > Accounts > Dropbox > Check is implemented).

Enyo-DCO-1.1-Signed-off-by: Francois-Xavier KOWALSKI <francois-xavier.kowalski@hp.com>
Merge remote-tracking branch 'enyojs/master' into ENYO-1740
Merge pull request #199 from enyojs/ENYO-1740

ENYO-1740, ENYO-1884: switch fsDropbox from manual to `dropbox-js` library