mbox-viewer 1.0.3.59

• To improve mboxview, please post reviews on what works, what doesn't, create bug tickets and enhancement requests.;
• Updated MimeKit to address security issues.;
• Updated RtfPipe to FridayForks.RtfPipe to enhance RTF parsing.;
• Enhanced to persist width of columns in the mail summary.;
• Enhanced handling of "Line " lines in mails to prevent breaking mail parsers when merging eml files.;
• Updated User Manual to describe new and updated features.;