Add flag for showing aliased items in catalog/timeseries

[adamkorynta]

The current implementation uses AV_CWMS_TS_ID2, which pulls back all alias time series. For the client, non aliased items are preferred, so either always filtering them out or adding a flag to conditionally filter them.

[MikeNeilson]

Thanks for pointing out that that wasn't happening. The actual intent is that all the aliases show up in a separate list. But the flag is a good idea since a given user may not care.

[rma-rripken]

Need decision : It would be helpful to get some detail about whether to include aliases or not by default or if we are supposed to add a flag