factor out Feature into separate file
separate db creation and db interface into different files
update tests for reorganization
aliases on Feature
add helpers.feature_from_line()
allow string or dict attributes when creating a Feature
add helpers.asinterval()
parser tests and fixes to parser to pass tests
fix a parser test
featuretest.py -> feature_test.py (nose wasn't finding)
remove extra print
fixes to feature.py and tests
additional tests for feature.py
more tests