mono-master: bring in line with mono package

Note: This has --enable-parallel-mark and -enable-dtrace

We are running mono-master, and specifically targeting OS X. Let's
leverage dtrace and live life a bit on the wild side.
gtk-sharp3: add patches from knocte to mono-cairo
banshee: use mono-master

mono 3.2.3 would require an increasing amount of backports from mono's
git master to OS X Mavericks and 64 bit. Just use git master and be
done with it.