As part of DCist’s new commitment to hard-hitting grocery store coverage, we’re sad to report that the new Trader Joe’s in the District’s burgeoning West End neighborhood has a little more gestating to do before it shows its Two-Buck Chuck to the world. Originally slated to open today, the long-awaited Trader Joe’s now plans to open its doors in early September. For the past few weeks, workers on the new grocery store in the yet-to-open…