TODO in the code (species.py)

[mfrasca]

As a forgeful programmer, I want to keep things centralized, and I do not wnt todo hanging in the code, that really are issues to be examined.

Actual behaviour

just removed from species.py:

# TODO: we need to make sure that this will still work if the
# AccessionPlugin is not present, this means that we would have to
# change the species context menu, getting the children from the
# search view and what else

there isn't anything like an AccessionPlugin, unless one means the GardenPlugin. but why do we need to worry about it not being present?