features.js: support execution at build time (in nodejs). Fixes #512
features.js: support execution at build time (in nodejs). Fixes #512

tkrugg/deliteful,brunano21/deliteful,brunano21/deliteful,cjolif/deliteful,harbalk/deliteful,EAlexRojas/deliteful,tkrugg/deliteful,kitsonk/deliteful,kitsonk/deliteful,cjolif/deliteful,EAlexRojas/deliteful,harbalk/deliteful