Notice: vboxwrapper is not longer required for GNS3 >= 1.2.3
To control VirtualBox on Linux/Unix. This is meant as a temporary solution while waiting for VirtualBox API and XPCOM to be ported to Python3 (main problem being the XPCOM module).
Vboxwrapper must be installed using Python 2.7 in the following way:
python2.7 setup.py install