Add support for view with namespaces
Merge pull request #1 from msaglietto/views-with-namespace

Add support for view with namespaces
Models are automatically created by the collection.
Update Handlebars to 1.0.0-rc.3.
Refactor nested views management.

HandlebarsView is now responsible for resolving, rendering and attaching
nested views.
Refactor tests according to the previous refactoring.
Add a test: a nested view must be defined in a HandlebarsView.
Bump version to 0.2.0.