Don't crash chef if it's run outside of a website.

--HG--
extra : rebase_source : 5da0841b5651e27c54b7fcafb9bc838f448ebfae
Fixed an argument bug with the `chef prepare` command extensions.

--HG--
extra : rebase_source : f055acf93d362dae80fb8a1ea87ec7df1d6d7cd6
Only show commands that are valid when inside/outside a website.

--HG--
extra : rebase_source : 618e0539f9e2aa21d3e83316426e8a1cf05584c7