Generate source maps for JS bundle
Generate source maps for JS bundle

This will simplify debugging of compressed UI version

Change-Id: Id408a24efbe7e436c281cf87bed446cee7567d78

stackforge/fuel-web,huntxu/fuel-web,eayunstack/fuel-web,nebril/fuel-web,huntxu/fuel-web,SmartInfrastructures/fuel-web-dev,nebril/fuel-web,SmartInfrastructures/fuel-web-dev,eayunstack/fuel-web,nebril/fuel-web,huntxu/fuel-web,stackforge/fuel-web,nebril/fuel-web,nebril/fuel-web,eayunstack/fuel-web,SmartInfrastructures/fuel-web-dev,huntxu/fuel-web,stackforge/fuel-web,prmtl/fuel-web,eayunstack/fuel-web,eayunstack/fuel-web,SmartInfrastructures/fuel-web-dev,prmtl/fuel-web,prmtl/fuel-web,SmartInfrastructures/fuel-web-dev,prmtl/fuel-web,huntxu/fuel-web,prmtl/fuel-web