[BioPython] parsing phylogenetic trees in Python

[Gregory Singer]

Quoting Catherine Letondal <letondal at pasteur.fr>:

> Gregory's package seems to be a good starting point for code to provide
> standard operations on trees encoded in Python, but there is no parsing, I am
> right 
> Gregory?

Ack! Please call me Greg. Only my mother calls me Gregory. Anyway, you're right
about the lack of BioPython-style parsing, which would be a nice addition (and
probably not that difficult?)

 - Greg