Refactor ContentController#generate_url
BaseController#success_url, #build_breadcrumbs, #add_resource_breadcrumb should be protected

Conflicts:
	app/controllers/releaf/base_controller.rb
Refactor BaseController, extract resource validation code to resource_validator module

Conflicts:
	app/controllers/releaf/base_controller.rb
	lib/releaf.rb
Extract Template filter form BaseController to module

Conflicts:
	app/controllers/releaf/base_controller.rb
	lib/releaf.rb
Add changelog entries for recent changes
fix/clenaup resource_validator test