New busycode in TkRat

[maf@tkrat.org]

Hello,

I just committed some significant changes to the busycode in the TkRat
cvs archive. I hope that these changes make the code more likely to
compile correctly on more systems. Please test it and send feedback to
me.

I am also considering a change to the message-list behavior. That is
currently when one right-clicks on a message it gets flagged. I would
like for right-click to pop up a context-menu instead. If I do this then
I would also make shift or control-left click flag a message. Would this
upset people?

	/MaF