First version

Just an initial first version of this cookbook to get feedback. Will add a few more recipes soon. There's a bit of weirdness in it so bare with me.
You define a resource and a provider, then call it something like:

```ruby
mount_sshfs "name" do
  options "-o 'StrictHostKeyChecking=no' -o allow_other ... "
  mount_point project_dir
  mount_source sshfs_url
end
```