Use helper function
Total hours counts now calculate correctly.  Might fix hughescr/Timesheets#3
Fix warning in TAFetchedResultsController
Merge branch 'release/1.1.1'

* release/1.1.1:
  Fix warning in TAFetchedResultsController
  Total hours counts now calculate correctly.  Might fix hughescr/Timesheets#3
  Use helper function