Fixed bug in case where user has access to zero experiments.
Using Ubuntu's python-fuse package is recommended over using
PyPI's fuse-python. Running "sudo python setup.py install"
now gives a warning, explaining that fuse-python is not
installed automatically from PyPI.
Minor fix for directory size in stat method.
Merge pull request #19 from wettenhj/master

Fixed bug in case where user has access to zero experiments.