Incorporate OpenLayers.Control.LonLat as MousePosition

Moving to 2.2 release, if Jeff replies.

Erik or Schuyler, can you look through this over for me?

Patch looks good and a very useful feature. Three comments:

1) why create 'element' ? OpenLayers.Control creates this.div, and doesn't seem to me like there is any reason to create another div (element) within that div. For simplicity, I think this should just use this.div

2)

 	93	        if (newHtml != this.element.innerHTML) 
 	94	            this.element.innerHTML = newHtml; 

according to CodingStandards this should be:

 	93	        if (newHtml != this.element.innerHTML) {
 	94	            this.element.innerHTML = newHtml; 
 	95	        }

3) Instead of calling

 	58	        this.map.events.register( 'mousemove', this, this.mousemove); 

from draw(), I think that line should be put in an overridden setMap() function -- although this works fine, a user *could* call draw on a control before (or without ever) adding it to the map... so we should wait until the map has actually been added for to attach this event.

4) Finally, I would suggest changing the function name mousemove to redraw

1. We support using 'element' from the options hash, so we want to keep this.element around -- if we don't get passed one, just use this.div, rather than creating another one.

2. Done.

3. Yep, done.

4. I'm in favor.

With those four changes, I'm going to go ahead and commit r1665.