Two wireless changes:
* On the shownode page include the channels that a wireless interface is currently set to, by looking at the interface_settings table. So, if you click on an allocated node in the wireless map, you can see what channels it is using. Still to be done; map between a channel number and a frequency. * On the floormap page, create a small table at the top of the page, listing what frequencies are in use on each floor. This is rather primitive of course, especially the part where I assume we have just one building, but it will do for now. This is not complete. We probably need some sense of scale on the maps.