Unified formatting helpers in PKFormatting category
Made PKDate subclass of NSDate
Made PKDate support NSSecureCoding
Use PKDate for item date values
Use new date parsing methods in PKReferenceTaskData
Use new date parsing methods in PKStreamTaskData
Unified task parameters for create/update task
Fixed reminder delta parameter for tasks
Version model keys for PKItemFieldValueDateData
Override init for PKDate
Cleaned up way to discard time from date in PKDate
Merge pull request #10 from podio/date-improvements

Date improvements to handle dates without time