Add explicit `ignore_root` arg to `find_bindings`
More work on view attributes

- add support for hash attribtues (e.g. style)
- add `to_s` and `to_value` methods on `Attribute` for getting raw
value (e.g. Array for class) or constructed value (e.g. classes
separated by a space)
- renaming
- tests
Re-add support for lambda attribute values
Change presenter load order

Processors must be loaded before views so they can be cached run
through the appropriate processor.
Remove silly `is_a?(Array)` checks
Merge branch 'master' into 0.9-dev
Handle root node when finding bindings
Merge branch 'master' into 0.9-dev