nothing warns you if you don't have python-yaml installed

[gregsfortytwo]

gregf@pudgy:~/src/downburst [master]$ ./virtualenv/bin/downburst create downburst-test-01
Traceback (most recent call last):
File "./virtualenv/bin/downburst", line 9, in
load_entry_point('downburst==0.0.1', 'console_scripts', 'downburst')()
File "/home/gregf/src/downburst/downburst/cli.py", line 48, in main
args = parse_args()
File "/home/gregf/src/downburst/downburst/cli.py", line 32, in parse_args
fn = ep.load()
File "/home/gregf/src/downburst/virtualenv/local/lib/python2.7/site-packages/distribute-0.6.24-py2.7.egg/pkg_resources.py", line 1989, in load
entry = import(self.module_name, globals(),globals(), ['name'])
File "/home/gregf/src/downburst/downburst/create.py", line 7, in
from . import iso
File "/home/gregf/src/downburst/downburst/iso.py", line 7, in
from . import meta
File "/home/gregf/src/downburst/downburst/meta.py", line 2, in
import yaml
ImportError: No module named yaml

:(