[atlas] Some UDM comments

I'll answer the ones I can.

> 2) When creating a UDM and specifying source ASN, you can't type in
that box and must use the pull-down.  Related to #1, if you increase
probes to (eg: 5) it resets to 1 after you select the ASN.

We're currently working on a complete rewrite of the interface for UDM
creation that will include all sorts of nifty things like autocompleting
ASNs, so we've got you covered here.

> 3) When stopping a UDM that is set for ongoing/no-end, it would be
nice to have a 'stop now' vs having to pick the next 15 minute
interval.  In theory the system could auto-populate this.

Currently the only way to do this is to find your measurement in the
list of measurements, right-click and select "Stop".  In the new version
you'll be able to stop a measurement on its detail page as well.

> 4) I do like the probes/map/seismograph view, is it possible to
provide a direct-link to these public UDMs without logging-in?  (I
haven't looked closely so there may be a way to do this).  Trying to not
need to fetch the data and generate my own graphs...

Direct-linking is currently available through a convoluted URL structure
that I'd rather not share publicly for fear that it will fall into
common usage.  The new pages (due out in the next few months) will
follow the typical structure of /measurements/MEASUREMENT_ID/#tab-name,
but that's not out yet.

If you really can't wait for the new pages, email me off-list and I'll
hook you up with the weird way we currently handle deep linking.