DXR UI Refresh

Once upon a time, Schalk Neethling did some great surveys of the userbase and some heuristic analyses of the UI, resulting in some nifty mockups.

Then Erik Rose came along and drew up some sketches drawing from those but simplifying:

• Removing the front page, which not a soul remembers the reason for and which complicates the implementation and visually destabilizes the UI when it goes "poof". (I think the UI was inspired by Google. But, unlike them, we don't have other properties to advertise, so we don't need a place to park a navbar.)
• Teaching the query syntax via live feedback from the advanced search form rather than through written instructions. It's a little more JS, but users won't have to pogo-stick back and forth to a help page.
• Making a few improvements to the multi-tree story

Pics to come.