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

- Fix tests that were failing because of misconfigured
  template path
- Fix formatting issues identified by flake8

*   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.

* Archives are generated in begin_site to honour meta data
* Archives are first class resources
* Archive configuration now accepts an additional meta parameter
* The default nodemeta property now points to meta.yaml

* Ignores .hg, .svn, .git by default
* Additional nodes can be ignored by adding to site.config.ignore