The 21st century has seen dramatic improvements in faking it. These days we've got bigger and better fake nails, fake hair, fake boobs, and now? Fake eyelashes. Lux Lash, at 232 Newbury Street, offers semi-permanent lash extensions that last from a weekend to two months. The finished result is like a 24-7 application of lengthening and thickening mascara. Bostonist isn't entirely sold on the transformational powers of synthetic lashes, even if they are individually applied......