arules_1.6-8

New Feature

• transactions have now a constructor function called transactions().
• Added new method compatible() to itemMatrix to check if the item coding is compatible
  between two objects.
• c() now produces a warning if two itemMatrices with different itemCoding are combined.
• encode and recode accept now for itemLabels also objects with an itemLabels method.
• recode is now also available for associations (itemsets and rules).

Changes

• recode: parameter match is now deprecated. Use itemLabels

Bug Fixes

• fixed addAggregate problem with character (reported by javiercoh).