wenzelm [Thu, 28 Oct 2010 21:59:01 +0200] rev 40234
added Exn.interruptible_capture, which reraises interrupts as required by user-code (when Exn.capture is not immediately followed by Exn.release);
refined Exn.is_interrupt: detect nested IO Interrupts;
generalized Exn.map_result;
more precise dependencies;