Renamed -dateFromReportDate: to -dateFromReportDateString: on NSCalendar (Autoindigestion).

Added unit test covering yearly report date string.
Extracted -nextReportDateAfterReportDate: method in ReportCategory.
Renamed some local variables in -autoingestionJobs method

Added -mostRecentReportDateStringFromFilenames: method to
ReportFilenamePattern class.

Renamed methods in NSDate (Autoindigestion) category:
  -isEarlierThanDate: to -isLessRecentThanDate:
  -isLaterThanDate: to -isMoreRecentThanDate:
Added yearly sales summary reports to vendor report categories.