[2.5.0] - 2018-11-26

Added

• now supports case folding tokenizer (#88)
• additional Character methods: CharDirection, GetIntPropertyValue, ToLower, ToTitle, ToUpper,
  IsLetter, IsMark, IsSeparator
• partially implemented Normalizer2 class
• partially implemented ResourceBundle class
• partially implemented CodepageConversion class
• partially implemented MessageFormatter and Transliterator classes
• add BreakIterator.GetEnumerator() method and BreakEnumerator class to allow
  enumerating over word segments as described in the ICU user guide (the
  existing method BreakIterator.Split ignores spaces and punctuation)
• Wrapper.MinSupportedIcuVersion and Wrapper.MaxSupportedIcuVersion constants

Changed

• output error on Linux if unmanaged libraries can't be loaded
• allow to confine version number after initialization. In this case we internally
  do a reset and re-initialize with the new version number.

Fixed

• icu.net.dll for netstandard1.6 now has the correct version number (#72)