Allow nicknames to expand to multiple VSO queries

[igor]

Currently, nicknames can only expand to a single value for each facet (except for 'physobs') ... Igor has a need for it to expand to multiple spectral ranges, and I could see it being used for other facet multiples in the future.

Igor's specific request might have also been handled by a negated query (#115). (the larger range, minus the smaller range), which would reduce the odds of duplicates ... but we don't yet have support for that one, either.

(11:33 AM) isuarezsola: ooh that remind me something I tried to do the other day
I wanted to create a nickname O-SPAN h-alpha centered ...
actually not that one ..
O-SPAN h-alpha off-line
(11:37 AM) Joe: should just be a matter of editing the 'nicknames' file, and giving it to everyone
(11:37 AM) isuarezsola: no but the off-line is different
(11:37 AM) Joe: hmm...
so you need a way of telling the two apart in a query?
(11:38 AM) isuarezsola: I'd need two nicknames 6562.0 to 6562.79 and 6562.81 to 6563.5
(11:38 AM) Joe: and the VSO data model doesn't currently have differentiation?
ah ... I think the nicknames can handle it .... not sure
lemme look at the code
(11:39 AM) isuarezsola: Is off-line from the center line so it has a left and right ...
(11:43 AM) Joe: physobs is the only one that currently supports 'multiples' in nickname  aliases
I can change it, I think ... it's in UserInterfaces/UserInterface/Nickname.pm