ENYO-113: Support non-standard locations for enyo, libs

Garnet and Sunstone are using a slightly different bootplate
structure, with enyo and the libs one level up from the app
source code.

Adding "gather" support to deploy.js and minify.js to gather
lib assets up into the default location during deployment
(and rewrite url paths in CSS files accordingly).

Enyo-DCO-1.1-Signed-Off-By: Gray Norton (gray.norton@lge.com)
Merge pull request #849 from enyojs/ENYO-113-graynorton

ENYO-113: Support non-standard locations for enyo, libs

Reviewed-By: Cole Davis (cole.davis@lge.com)