[imp] compose utf encoded messages

[Michael M Slusarz]

Quoting Jan Schneider <jan@horde.org>:

| Michael, if you have some spare time, can you take a look why the charset
| isn't set correctly to utf-8 when composing in utf mode?

See if the changes to compose.php fix this. (We weren't setting the 
character sets in text/* parts).

michael

______________________________________________
Michael Slusarz [slusarz@bigworm.colorado.edu]
The University of Colorado at Boulder