- Updated DUMB to revision d31fb2084659b64d07eb0644d9bacfd67059d066

    - Fixed C++11 compilation error on Mac OS X
- Updated DUMB to revision 991ce8202643a296969d9a623e9702966a957e69

    - Moved DUMBFILE structure to its own header file to unify the rare cases where it needs to be visible outside of dumbfile.c

I skip f5a1c5ec318cd7c17fb54f2ed2cb70d72cd549f6 for now, since it's huge and full of conflicts, but it is IMO important and should be done ASAP.