Tests are not part of the core logic of Hyde, and they should not be
packaged as such.

Signed-off-by: Julien Danjou <julien@danjou.info>

*   Remove `hyde.fs` use `fswrap` package instead.
*   Remove logging functions from `hyde.util`. Use `commando.util`
    instead.
*   Remove `hyde.loader`. Use `commando.util.load_python_object`
    instead.

Attach all post resources to all page resources.  Now `hyde gen' works.  Also
fix up a couple of the unit tests.

Configured in a resource's metadata, creates copies of that resource, each of
which will receive its own `page' containing a distinct list of `posts'.