6.4 (CVS_TAG: release_6_4) Mar 12, 2013
* Added visitor API on tag list block
* New interface to identify and use generic fields (notice DSS methods are not part of non-generic fields)
* Added API on MT classes to simplify messages creation
* Comprehensive getters and setter API for field classes using functional names
* Added PatternContainer interface and implemented in field
* Better CurrencyContainer API
* Added API to SwiftFormatUtils to get String components from Calendar using different SWIFT date/time formats
* Implemented API for CurrencyContainer for all Fields
* Added MT helper classes for MTs: 518, 549, 800, 801, 802, 824, 600, 601, 604, 605, 606, 607, 608, 609
* Added Field implementations for 33G, 35U, 86B, 68A, 68B, 68C, 94C, 31F, 37a, 34J, 35H, 31X
* Added API to simplify messages creation; defaults for header blocks attributes, addField to Block4, setSender at Block1