Fix: Players should always hear the sound of people being cured or killed. Fixes issue 1407.
Added: More intelligent redistribution of research percentages, you can now concentrate research on operating theatre diseases too. Adds issue 1388.

git-svn-id: http://corsix-th.googlecode.com/svn/trunk@1831 c39591fa-788f-11de-a72b-d90af8dea425