refactored phyloxml generation so that xml can be obtained directly
for use by other services. also, some commented-out vestiges of code
pertaining to the ability to retrieve and display subtrees by node id
to be used as root (primarily intended to support big trees like
the taxonomy case, although not sure that is going to work out
in the long run)
Merge branch 'master' of https://github.com/ncgr/lis_gene_families

Conflicts:
	django/chadotest/chado/views.py