manage.py addOrganism capitalizes the short_name entry

[mpoelchau]

It looks like the addorganism script capitalizes the organism 'short_name' when it adds it to the database. It needs to be lowercase, instead.

$ python manage.py addorganism Photinus pyralis
Succeessfully add to database

django=# select short_name from app_organism where display_name = 'Photinus pyralis';
 short_name 
------------
 Phopyr
(1 row)