Include the alt gazetteer names in dropdowns

Location Names: use the alt name as well as the main name to retrieve
the subsequent level lists of names.
Form  Manual Match: Display the alternate gazetteer names in the
dropdowns
GeoCoder and Fuzzy match use alt as well as the main names.
Unit tests added for Location Names

Currently failing when alt names supplied
Bug Fix: Location Names

The list of available names for subsequent levels should be the same
whether the main or alternate name is supplied
Unit tests: location names tests now passing
Unit Test added: location names

Location names search must be case insensitive,
Bug Fix: Location name lists now case insensitive

Location names in the drop down lists are now filtered in case
insensitive way