ENYO-2811: update to recent Enyo (pilot-5) & fix associated issues

Tested Ok: OSX/ChromeCanary, OSX/Safari, OSX/Firefox, Win7/Chrome, Win7/IE10
Tested NOk: Win7/IE9, Win7/IE10-IE9-mode

* ENYO-2811, ENYO-1768: test.html also needs manual enyo path aliases (HEAD, enyojs/ENYO-2811, ENYO-2811)
* ENYO-2811, ENYO-1768: preview is a distinct app, needing its own manifest
* ENYO-2811: update `lib/layout` to `master/HEAD`
* ENYO-2811: remove leading garbage character added by Windows editors
* ENYO-2811: remove redundant enyo.require("$lib/xxx")
* ENYO-2811: manually define package aliases
* ENYO-2811: update `enyo`+ `libs/*` to `pilot/pilot-5`
* ENYO-2811: fix several manifests (`package.js`) content

Enyo-DCO-1.1-Signed-off-by: Francois-Xavier Kowalski <fix@hp.com>