add tracking to lib/classifiers resources
we have to be more careful about tracking classifier resources
initial adapter reference class
typo + initial tests
some tests for adapter reference class
add a TODO to move variable velocity info elsewhere
 I love killing code -- begin refactoring import stage to use adapters
interim re-documentation
wip
wip
finish refactoring import stage to use adapters
fix tests for adapter refactor of import stage
re-doc
add some documentation to explain dapters
up the version
small re-doc
refactor export stage to use adapters
re-document
adding custom adapters
custom adapters are working, but a few more tests would be nice