dopewars 1.5.9 release

I've just released dopewars version 1.5.9. This is largely a bug fix release (there was a slightly annoying crash bug with version = 1.5.8 which occurred in some circumstances when you clicked on the "drop drugs" button in the graphical client). There are also, however, some minor improvements to the text-mode client, primarily to allow it to work better on screens which aren't 80x24.