This package is deprecated. All the work has been merged to angr as Tracer and CrashMonitor exploration techniques. Although we do provide a layer for backward compatibility here, direct use of these new exploration techniques in angr is preferred, since it offers more flexibility.
If you have QEMU compilation problems, installing these packages may be useful (tested on Ubuntu 14.04 64bit):
apt-get build-dep qemu-system
apt-get install libacl1-dev