Fix issue 18: beacon not sent if using https

When the page_ready event fires, all event subscribers are called in
order. By default, the order is:

- BOOMR.plugins.RT.done
- BOOMR.plugins.BW.run

each is supposed to call BOOMR.sendBeacon() when done.

The bug in the https flow is that the BW plugin never calls
BOOMR.sendBeacon() in that block.

boomerang.js

@@ -1237,6 +1237,7 @@ BOOMR.plugins.BW = {
 
 			BOOMR.info("HTTPS detected, skipping bandwidth test", "bw");
 			impl.complete = true;
+			BOOMR.sendBeacon();
 			return this;
 		}