ENYO-2819: Add the Qr code library.
ENYO-2819: add the QR code kind.
ENYO-2819: the QR code image is shown when an appId is selected from the App Id picker.

The actual URL encoded in the Qr code dosen't contains the parameter qr_key used as an authentification token.
ENYO-2819: fix jshint warnings.
ENYO-2819: the Qr code is also refreshed when a new App data is recieved.
ENYO-2819: update a commented code.
ENYO-2819: remove dead code.
ENYO-2819: use the user token instead of qr_key
ENYO-2819: add the variable qrPath the ease (a littel bit)  the code browsering.
ENYO-2819: fix a jshint warning.
ENYO-2819: The QR code is displayed when the user select a platform in which the build status is complete.
ENYO-2819: the appId & token are initialized at undefined instead of null.

The Qrcode image changes also when the the token value change.
ENYO-2819: edit the css properties of the QR code image.
ENYO-2819: change the log instruction to trace().
Merge branch 'master' of github.com:enyojs/ares-project into ENYO-2819
ENYO-2819: mention QRcode security issue (ENYO-3491) in KNOWN-BUGS
Merge pull request #637 from enyojs/ENYO-2819

ENYO-2819: Add a QR code image to download a completed built application