Version 2.5.1 (2014-04-??)
- Make option -i to work with multipart messages.
+ Make options -e/-i to work with multipart messages.
- Open all files in binary mode. Output os.linesep instead of '\n'.
+ Add option -I to completely ignore a part - no headers, no body,
+ no warning.
+
+ Open all output files in binary mode. Output os.linesep instead of '\n'.
Test --save-headers|body|message masks one after another to allow
saving a message or a subpart to more than one file.