doc: add Paul to the credits

Signed-off-by: David Aguilar <davvid@gmail.com>
tests: use absolute imports for test.helper

Signed-off-by: David Aguilar <davvid@gmail.com>
tests: adjust things so that test_app and test_qtutils can pass

Signed-off-by: David Aguilar <davvid@gmail.com>