Remove unused imports

Signed-off-by: Kevin Conway <kevinjacobconway@gmail.com>
Add plugin support for optimizers

This should make it possible to develop additional optimizers
as third party extensions rather than always requiring that
new optimizers must be merged into the project.

Signed-off-by: Kevin Conway <kevinjacobconway@gmail.com>
Remove old samples

These will be added back once better support for those optimizers
is complete.

Signed-off-by: Kevin Conway <kevinjacobconway@gmail.com>
Change name of arg register function to 'register'

Signed-off-by: Kevin Conway <kevinjacobconway@gmail.com>
Add support for checking AugAssign nodes

Signed-off-by: Kevin Conway <kevinjacobconway@gmail.com>
Add first draft of tests

Signed-off-by: Kevin Conway <kevinjacobconway@gmail.com>
Add first draft of docs

Signed-off-by: Kevin Conway <kevinjacobconway@gmail.com>
Add config for TravisCI

Signed-off-by: Kevin Conway <kevinjacobconway@gmail.com>