#52 Taxa->Matrix conversion is slow

[Mark Dominus]

BP says:

> - If I go from a list of taxa under the Taxa tab -- and if that list is
> fairly sizable -- and then click on the Matrix Tab, the query takes
> quite a long time. This is a very low priority thing, but perhaps it's
> worth analyzing this query to see if there are way to speed it up. I
> would have thought that it would be a fairly quick join, but then again,
> we're using Hibernate here...