TODO
* systemtime print invalid times as hex string
* add functions similar to:
  - libfvalue_integer_copy_from_integer and libfvalue_integer_copy_to_integer
* change function comment for UTF size and copy functions
  see libfvalue
* formatting support
  - add support for duration
* filetime check for -0 ?
* add a more sophisticated day of the month check in date time values
* have API functions return 0 if value is not a valid date and time ?

Date time values:
* add non-with-index functions ?

FAT date and time
* implement individual fat_date and fat_time support ?

20090906
* see `git log' for more recent change log
* Created stand-alone version of version used in libpff

