When the rains came last week, there was a day when the clouds simply hovered over downtown. The clouds were so low that they seemed to hover just above all of the tallest downtown buildings. All except for one. If you were working on the top floors of the Austonian, you would have been the only people downtown actually in the clouds.And so today the Austonian officially stopped its seemingly endless ascent. With the addition of the first of six 32-foot steel beams that will define . . .