Kaffe Unicode support

Kaffe uses the java.lang.Character implementation from GNU
Classpath. It is at the level of Unicode 3.0, which is used by JDK
1.4.

The unicode tests in Mauve are apparently quite out of date, so
please don't bother reporting that kaffe has a ton of failures on
them.

Dalibor Topic <robilad@yahoo.com>
