Added LZMA enumeration value to CompressionMethod.

Added LZMAHeaderType enumeration.

Added LZMAOptions class.

Added ManagedLZMACompressor class.

Added ManagedLZMADecompressor class.

Added MatchFinder enumeration.

Added LZMACompressedStream class.

Added Unicode, UTF8Filename, and UTF8Comment values to ExtraHeaders enumeration.

Added TextEncoding enumeration.

Added DefaultTextEncoding and DefaultUnicodeUsagePolicy properties to ZipArchive.

Added TextEncoding and UnicodeUsagePolicy properties to ZippedFile.

Added TextEncoding and UnicodeUsagePolicy properties to ZippedFolder.

Added UnicodeUsagePolicy enumeration.