stop_travel messages now also apply to shift-run and rest (under the default

conditions this is irrelevant because al messages stop shift-run and rest).

Allow individual interrupts to be disabled for an activity using -=. For instance, interrupt_rest -= message will disable the stop-resting-for-any-silly-message behaviour (and also make stop_travel relevant to resting).

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@761 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dshaligram  on January 1, 2007
KU6YUIJWXZSNTABFB36HDEEZ6LTY7O4VKI3RNFBQE3LEYZCT3XQQC
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