Added filterCourseNames.sh. This is a filter that reads newline separated lists of course_display_name strings, and only outputs the names that are likely true OpenEdX courses, rather than name space polutions from testing. This bash based facility has an equivalent in the SQL world: the isTrueCourseName() stored function in json_to_relation/scripts/mysmysqlProcAndFuncBodies.sql. The searchCourseDisplayNames.sh, which generates the course and enrollment entries for the Web export UI was updated to use the new filterCourseNames.sh.