Update test_sort.py

deprecated assertEquals changed to assertEqual
Update test_factory.py
Update test_factory.py
Update test_factory.py
Update test_Factory.py
Update test_factory.py
Update test_sort.py
using with to open files to avoid ResourceWarning
Update test_factory.py
Update factory_py
Update factory.py
Update skbio/parse/sequences/factory.py
_factory.py
Update factory.py
Update factory.py
Update factory.py
Update factory.py
Update factory.py
Merge pull request #424 from charudatta-navare/master

solves issue #371