Minor improvements to the UI and the netloc_lookup_table_size method.

* netloc_lookup_table_size method now directly accesses the "used size" instead of calculating it.
* Fix some tab->spaces formatting
* Hide the "none" option in the netloc_reader_of since it is not quite ready for prime time.
* Minor improvements to the netloc_reader_of and netloc_reader_ib error messages
Add the test temporary files to the .gitignore