Added support for pluralized routes

[guernica0131]

Added support for pluralized blueprints:

if (this.pluralize) {
var inflector = Ember.Inflector.inflector;
type = inflector.pluralize(type);
}

Now if a user has pluralized blueprints, the Ember inflector with set the route to a pluralized route.

[bmac]

Hi @guernica0131 sorry I didn't respond to this before. Based on some of the discussion in #21 I think it make sense to make the routes pluralized by default instead of a using a flag. If a user doesn't want to have plural routes we should allow them to overwrite the pathForType method like ember's built in RESTAdapter.