When the proposed Austin Fairmont mega hotel project swooped in to the news a couple years ago, snatching the spotlight from the JW Marriot mega hotel, there was a healthy dose of skepticism about it would get off the ground.A lack of visible activity on the site has been quietly stoking perceptions that the Fairmont will end up anything more than pretty drawings. The site filed a site plan in October 2012, which is still in review, but site plans are never guarantees of construction.There had also been some chatter that a proposed sky bridge over . . .