On separate branch 'courseTableExtractionFeature' started script set to create course extracts.
Added makeAnonScreenName.py, which takes a clear-text screen name, and returns the corresponding anonimization hash. Added listCourseScreenNames.sh, which takes a grep pattern for finding a course in a tracking log file, plus a list of gzipped tracking log files, and returns a list of all screen names that generated events for that course. Added script makeScreenNameToAnonTable.sh, which takes a grep pattern for finding a course in a tracking log file, plus a list of gzipped tracking log files, and returns a CSV table that maps screen names to their corresponding anonymization hash.