Merge pull request #1 from jooh03/master

Handle writing UNA segment.
Fix line breaks.
Fix line breaks.
Rename properties to something not X12-specific.
Parse reals with different decimal point indicators.
Load reals from XML with different decimal point indicators.
Support reading EDIFACT.
Support EDIFACT release characters.
Fix converting UNA segment to string.
Recognize EDIFACT interchange, functional group and transaction set segment IDs.
Added a Save method with support for System.Text.Encoding.