Issue #712. Migrating field age_of_onset to global_age_of_onset (PatientClass)
Issue #712. Migrating field age_of_onset to global_age_of_onset (PatientClass)
Renamed migrator class. Chaged NumberProperty to StringProperty.
Merge branch 'issue-712' of github.com:soLEED/phenotips-1 into soLEED-issue-712