Make unittests easier to deal with.

- Test everything

    ./test_spec.py

- Test suite

    ./test_spec.py inverted

- Test unit

    ./test_spec.py inverted.test_7
Added section looping

( note: not implemented on inverted sections! )
Fixed partial scoping

partials would not get their parent's partial detials
(partials_path, partials_ext, partials_dict)
Added current scope key (.)