Used to sort a list of effort records by year.
# - - - P r i E n t r y . e f f B y Y e a r
@staticmethod
def effByYear(eff1, eff2):
'''Order Effort instances by (year_no, year_key)
'''
return cmp((eff1.year_no, eff1.year_key),
(eff2.year_no, eff2.year_key))